Posts Tagged ‘fixing’

Fixing Mate Adwaita theme problems on Debian and Ubuntu Linux

Wednesday, October 25th, 2017

fixing-mate-adwaita-theme-problems-on-Debian-Ubuntu-Linux-the-actual-problem-screenshot

After  trying out GNOME 3.2.x enough and giving it enough chance I've decided to finally migrate to Linux Mate graphical environment (the fork of gnome 2 for modern PCs).

I have to say I'm running Debian 9 Stretch on my upgraded Thinkpad R61, after 2 / 3 days upgrade operations from Debian 7 to Debian 8, from Debian 8 to 9.

Just Migrated to Mate all looked fine, but just as I wanted to make the look and feel identical to GNOME 2, I played with Appearance because I wanted to apply theme Adwaita the one, the one so popular since the glorious times when GNOME 2 was a king of the Linux Desktop. 

To add additional themes to MATE, I've installed gnome-themes-standard package, e.g.

apt-get install  --yes gnome-themes-standard

This package provides a number of Themes I could choose from and one of them is Adwaita Not surprisingly, I faced a theme issue
it complains about window manager theme "Adwaita" missing.

Using the example for Adwaita mate-appearance-properties gives, I believe this is the "Proper" way to fix it, so do the following in order;

The quick and dirty way when using it

  • Select Adwaita theme
  • Click on Customise

     

    • Select the Window Border tab
    • Select window border theme "TraditionalOk" and close

 

A Permanent Fix to the Adwaita missing its Theme Manager using terminal / console

I found that all I had to do to resolve the issue permanently was to do this;

vim /usr/share/themes/Adwaita/index.theme

And change at the bottom where it says 

MetacityTheme 

to say 

TraditionalOk 

instead of Adwaita.

I know why this works, I just do not know why Adwaita can't use its own Metacity theme without issues, aside from what the kind people at #gnome@irc.freenode.net said about Adwaita previously relying on Mutter.

Feel free to tell me if up explained did not work for you or if you have a better way to deal with the Adwaita missing manager theme issueso far I believe the  problem is resolved correctly.

Enjoy

Fixing 127.0.0.1 – – “OPTIONS * HTTP/1.0” 200 136 “-” “Apache (internal dummy connection)” / ::1 – – [-.. :- .. +0200] “OPTIONS * HTTP/1.0” 200 Apache access.log junk records

Saturday, December 1st, 2012

If you're on Debian Linux and you played with mpm_prefork_module MinSpareServers and MaxSpareServers directives, it is very likely your access.log apache log ends up with a plenty of junk messages like:

127.0.0.1 – – [25/Nov/2012:06:27:21 +0200] "OPTIONS * HTTP/1.0" 200 136 "-" "Apache (internal dummy connection)"
127.0.0.1 – – [25/Nov/2012:06:27:21 +0200] "OPTIONS * HTTP/1.0" 200 136 "-" "Apache (internal dummy connection)"
127.0.0.1 – – [25/Nov/2012:06:27:21 +0200] "OPTIONS * HTTP/1.0" 200 136 "-" "Apache (internal dummy connection)"
127.0.0.1 – – [25/Nov/2012:06:27:21 +0200] "OPTIONS * HTTP/1.0" 200 136 "-" "Apache (internal dummy connection)"
127.0.0.1 – – [25/Nov/2012:06:27:21 +0200] "OPTIONS * HTTP/1.0" 200 136 "-" "Apache (internal dummy connection)"
127.0.0.1 – – [25/Nov/2012:06:27:21 +0200] "OPTIONS * HTTP/1.0" 200 136 "-" "Apache (internal dummy connection)"
127.0.0.1 – – [25/Nov/2012:06:27:21 +0200] "OPTIONS * HTTP/1.0" 200 136 "-" "Apache (internal dummy connection)"
127.0.0.1 – – [25/Nov/2012:06:27:21 +0200] "OPTIONS * HTTP/1.0" 200 136 "-" "Apache (internal dummy connection)"
127.0.0.1 – – [25/Nov/2012:06:27:21 +0200] "OPTIONS * HTTP/1.0" 200 136 "-" "Apache (internal dummy connection)"
127.0.0.1 – – [25/Nov/2012:06:27:21 +0200] "OPTIONS * HTTP/1.0" 200 136 "-" "Apache (internal dummy connection)"
127.0.0.1 – – [25/Nov/2012:06:27:21 +0200] "OPTIONS * HTTP/1.0" 200 136 "-" "Apache (internal dummy connection)"
127.0.0.1 – – [25/Nov/2012:06:27:21 +0200] "OPTIONS * HTTP/1.0" 200 136 "-" "Apache (internal dummy connection)"
127.0.0.1 – – [25/Nov/2012:06:27:21 +0200] "OPTIONS * HTTP/1.0" 200 136 "-" "Apache (internal dummy connection)"
127.0.0.1 – – [25/Nov/2012:06:27:21 +0200] "OPTIONS * HTTP/1.0" 200 136 "-" "Apache (internal dummy connection)"
127.0.0.1 – – [25/Nov/2012:06:27:21 +0200] "OPTIONS * HTTP/1.0" 200 136 "-" "Apache (internal dummy connection)"
127.0.0.1 – – [25/Nov/2012:06:27:21 +0200] "OPTIONS * HTTP/1.0" 200 136 "-" "Apache (internal dummy connection)"
127.0.0.1 – – [25/Nov/2012:06:27:21 +0200] "OPTIONS * HTTP/1.0" 200 136 "-" "Apache (internal dummy connection)"
127.0.0.1 – – [25/Nov/2012:06:27:21 +0200] "OPTIONS * HTTP/1.0" 200 136 "-" "Apache (internal dummy connection)"
127.0.0.1 – – [25/Nov/2012:06:27:21 +0200] "OPTIONS * HTTP/1.0" 200 136 "-" "Apache (internal dummy connection)"
127.0.0.1 – – [25/Nov/2012:06:27:21 +0200] "OPTIONS * HTTP/1.0" 200 136 "-" "Apache (internal dummy connection)"
127.0.0.1 – – [25/Nov/2012:06:27:21 +0200] "OPTIONS * HTTP/1.0" 200 136 "-" "Apache (internal dummy connection)"
127.0.0.1 – – [25/Nov/2012:06:27:21 +0200] "OPTIONS * HTTP/1.0" 200 136 "-" "Apache (internal dummy connection)"
127.0.0.1 – – [25/Nov/2012:06:27:21 +0200] "OPTIONS * HTTP/1.0" 200 136 "-" "Apache (internal dummy connection)"
127.0.0.1 – – [25/Nov/2012:06:27:21 +0200] "OPTIONS * HTTP/1.0" 200 136 "-" "Apache (internal dummy connection)"
127.0.0.1 – – [25/Nov/2012:06:27:21 +0200] "OPTIONS * HTTP/1.0" 200 136 "-" "Apache (internal dummy connection)"
127.0.0.1 – – [25/Nov/2012:06:27:21 +0200] "OPTIONS * HTTP/1.0" 200 136 "-" "Apache (internal dummy connection)"
127.0.0.1 – – [25/Nov/2012:06:27:21 +0200] "OPTIONS * HTTP/1.0" 200 136 "-" "Apache (internal dummy connection)"
127.0.0.1 – – [25/Nov/2012:06:27:21 +0200] "OPTIONS * HTTP/1.0" 200 136 "-" "Apache (internal dummy connection)"
127.0.0.1 – – [25/Nov/2012:06:27:21 +0200] "OPTIONS * HTTP/1.0" 200 136 "-" "Apache (internal dummy connection)"

It was quite unexplainable to me what is causing all this errors. I've seen plenty of posts on the Internet discussing on that but most are somehow outdated and suggested solutions to the weird logged  internal dummy connection messages did not work well for me.

I would not care so much about the message, only if it was not creating a lot of bulk records in my logs which when later are compressed just take up useless disk space and besides that it makes following the Apache log with:

# tail -f  /var/log/apache2/access.log

hardly readable.

  • One of the many solutions and posts suggested a solution with mod_rewrite rules. It claims adding the rules to .htaccess or to apache config files (vhost confs whether multiple vhosts domains):

RewriteCond %{HTTP_USER_AGENT} ^.*internal\ dummy\ connection.*$ [NC]
RewriteRule .* – [F,L]

The full article you read the whole here.
I've tested this rules, and thought I might be doing something wrong this proved unworking for me. Besides that even if it worked I would not imply such fix, as it will be creating a useless extra load on each incoming Apache connection.

 

As a second solution as I found on stackoverflow's website is to add in apache / vhost configs:

<Limit OPTIONS Order allow,deny Deny from all </Limit> I tested this as well but it does not work either. I've seen a bunch of other posts and none seemed to be working, until I finally came across Linux Guru's blog which was discussing a similar issue suggesting a fix. The post is discussing on Apache access.log being filled with messages like: ::1 - - [13/Mar/2008:09:05:13 +0200] "OPTIONS * HTTP/1.0" 200 Which are almost the same except, the 127.0.0.1 is the IPv6's equivalent ::1. The blog provided solution is to use: SetEnvIf Remote_Addr "::1" dontlog CustomLog /var/log/apache2/access.log combined env=!dontlog What this makes is to completely clear up all occurances of ::1 in /var/log/apache2/access.log. Once it uses Apache Internal directive SetEnvIf Remote_Addr "::1" dontlog to "bind" ::1 to dontlog variable and then after the usual Log location definition – e.g. – CustomLog /var/log/apache2/access.log combined it instructs the environment not to log dontlog variable matches, i.e. env=!dontlog

Following he same logic to get rid of the so annoying:

127.0.0.1 – – [25/Nov/2012:06:27:21 +0200] "OPTIONS * HTTP/1.0" 200 136 "-" "Apache (internal dummy connection)"

I used as a solution adding:

SetEnvIf Remote_Addr "127.0.0.1" dontlog
CustomLog /var/log/apache2/access.log combined env=!dontlog

to /etc/apache2/sites-available/000-default (the default virtualhost), with the CustomLog directive, for more domains and more CustomLog VirtualHost definitions it might be necessary to add it to all Vhosts too.

This solution to Request of the Server to itself is also found on Apache's wiki  check what httpd wiki here.

As I've read further it appeared the same Internal Dummy Connection error is experienced on CentOS Linux too and the SetEnvIf method works there too well you can read post here.

Another possible solution though this didn't work for me is to just play with the settings of MinSpareServers and MaxSpareServers in apache2.conf (or httpd.conf on RedHats and BSD).

There is plenty of things written on the problem and it is really confusing to read about it, as most of the people writing about it were looking for the quick fix and thus just dropped few lines on what worked for them without much details on exact OS en Apache version.

The reason why:
127.0.0.1 – – [25/Nov/2012:06:27:21 +0200] "OPTIONS * HTTP/1.0" 200 136 "-" "Apache (internal dummy connection)" appear in log is due to the fact in Apache 2.x series Apache developers change the the Parent Apache controlling process to send periodic requests to its waiting idling childs, just to make the childs are still alive, this is done somehow in the very inefficient method IMHO by sending those dummy connection requests.

Maybe better and more thoroughful explanation on What is the Dummy Internal Connection and what causes it is on another Bulgarian Fellow Valery Dachev you can read his explan.

On a couple of occasions, I've experienced a very high server loads like load avarage of 180etc. , I have some suspicion that this super high loads are caused somehow by the Internal Dummy Connection thing too, though I'm not sure if my assumptions are correct. It could be I have messed up something with MaxSpareServers / MinSpareServers too, or just the hardware on the host is unable to process a sudden traffic peaks. I've red online other people who complain of similar overloads and complaininng about the Internal Dummy Connection too. But as long as my little research go, I couldn't find noone knowing anything on that. If some of the readers of this post has an idea on that please drop a comment !

Well that's it hope my little blog post sheds some more light on the topic, and lets hope in future Apache versions developers will come with less resource hungry method to do internal dummy checks for exmpl. by sending a SIGUSR signal.

Install Acer Aspire notebook 5100-5023 Windows XP 32-bit Drivers – Fixing problems with Wireless, Video and TouchScreen

Tuesday, October 30th, 2012

Acer Aspire 5100 - 5023 Windows XP drivers download, acer aspire laptop picture

 

I had to fix one old notebook computer Acer Aspire model 5100 – 5023.
The PC was preloaded with Windows 32 bit XP by someone but the drivers were not installed. I tried installing the drivers downloading them from Acer.com's website drivers download section from here . However the PC in question as it was writen on the vendor sticker was not 5100 but some kind of 5100 modification laptop. Some of the few differences between Acer Aspire 5100 and Acer Aspire 5023 are 5100 is bundled with Camera and a TV Tuner, whether 5100-5023 is without WebCam and TV Tuner.

The most important drivers I've downloaded rom Acer.com's for me was the Wireless Adapter drivers, because without internet on it takes time downloading drivers from my notebook and moving them via an USB stick … I've downloaded drivers for Wireless as provided by website (Wireless_Atheros_5.3.0.67) but installing them though I didn't get any error and the drivers brought up the Wireless Adapter, somehow I couldn't connect to any wireless network protected with WPA2-PSK key (passphrase) encryption. The Windows XP installed by somebody before I received the laptop for repair was Service Pack 2 (SP2) and latest stable Win XP is with SP3 as well as a bunch pack of updates after SP3 so updating Win XP SP2 to Win XP SP3 would have probably take more time than a clean re-install. Besides that the Computer did not have any information to backup as it was bundled with a fresh Win XP SP2 so formatting was not a problem either.

Thus Ire-installed over OS, formatting with Quick Format and a clean latest Windows English XP SP3 .

After re-installing it took me a while of pondering until I figure out what drivers I need to install, I knew for sure there might a problem with Wireless Adapter as on the previous WIN XP installed it did not work. So before proceeding to download all for Acer Aspire 5100 from acer.com's website, I first used Everest 2.20 Home edition to check the exact PC hardware Vendors and consequentially look for the correct WI-FI driver. Everest identified the Wireless Adapter as

  • Atheros_AR5005G_Wireless_Network_Adapter_NE785H

so I looked on the Net for the driver. Actually there are some other brand notebooks which also come bundled with NE785H (i.e. Asus, HP). First I couldn't find correct driver for Acer and give a try installing a NE785H driver for Asus notebook this did not make the WI-FI work correctly, so after a further investigation I found Wireless NE785H 32 bit Windows XP driver for Acer laptops a mirror of is here

After installing this driver, I've downloaded all the rest of drivers from acer.com's website, for convenience of people who look for same Acer Aspire 5100 – 5023 drivers please check my drivers mirror here

For convenience, I've made also a Acer-Aspire-5100-5023-XP_Drivers.tar.gz archive of all drivers for Aspire 5100 – 5023  notebook here (Archive size is 256MB).

Two important notes to make here is I had a severe problem with the notebook touchscreen and for a long time I thought TouchScreen device is not working because of improperly intstalled driver (in Drivers provided by Acer.com there are two drivers provided for two different TouchPad devices – (Synaptics and Elantech). I tried installing them one by one and both together but in any case the TouchScreen did not react but keep hanging – fixing it was as simple as pressing simultaneously FN + F7!

Also another obstacle, I've faced was with the Video Card the notebook is with Integrated ATI Radeon Xpress 1100 as visible in Everest, drivers. In list of drivers on acer.com's website there was not a VGA driver for XP? This was puzzling so I googled and found few ATI Radeon Xpress 1100 drivers for other notebook vendors just like with Wireless. Downloading and testing other vendors drivers seem to install well but inside Control Panel -> System (Device Properties) -> Peripherals  Video Card was with yellow questionmark (not properly working) …

It took me a while to figure it out but later it appeared for Windows XP VGA drivers for Aspire 5100 – 5023 (ATI Radeon Xpress 1100) are there under the not so intuitive name Chipset_ATI_8.251.060427_XPx86.zip. Updating the improper driver inside System -> Peripherals -> Video Adapter with the one from the zip made the Video card finally work 🙂
With rest of PC hardware drivers, there was not issues, I just had to install as usual all rest from vendor ZIPs:

Audio_5_10_0_5273.zip
BTW_5_1_2535_0_utility_1500.zip
CPU Driver Ver.1.3.1.0.zip – For improved CPU work
FIR_SMC_5.1.3600.7_XPx86.zip – Infrared support and card reader
MODEM_Foxconn_7.62.0.0_XPx86.zip – for Integrated Foxconn Modem Wireless LAN_Broadcom_4.100.15.5_XPx86_A.zip – Driver for 5100's lancard
Bluetooth_Broadcom_5.1.2535.0_XPx86.zip – Driver for bluetooth device

Lastly as an article close up if you're living on the territory of The Netherlands (Arnhem , Nijmegen or the near cities) looking for a very Cheap repair (50 to 70 EUR) of your Windows OS PC or notebook contact me 🙂


Fixing strange Debian Linux Squeeze system overloads and Apache Webserver crashes

Friday, October 19th, 2012

For quite some time, my home run server pre-installed with Debian Squeeze Linux has been crashing in a very strange circumstances inside dmesg kernel log and in /var/log/messages on times, when this crashes occur I see errors / warnings spitting not very helpful kernel debug messages like this:


Oct 16 11:32:28 pcfreak kernel: [66657.797930] Pid: 0, comm: swapper Not tainted 2.6.32-5-amd64 #1
Oct 16 11:32:28 pcfreak kernel: [66657.797931] Call Trace:
Oct 16 11:32:28 pcfreak kernel: [66657.797933] [] ? select_nohz_load_balancer+0x94/0x163
Oct 16 11:32:28 pcfreak kernel: [66657.797943] [] ? __report_bad_irq+0x30/0x7d
Oct 16 11:32:28 pcfreak kernel: [66657.797945] [] ? note_interrupt+0x105/0x16e
Oct 16 11:32:28 pcfreak kernel: [66657.797948] [] ? handle_fasteoi_irq+0x93/0xb5
Oct 16 11:32:28 pcfreak kernel: [66657.797952] [] ? handle_irq+0x17/0x1d
Oct 16 11:32:28 pcfreak kernel: [66657.797954] [] ? do_IRQ+0x57/0xb6
Oct 16 11:32:28 pcfreak kernel: [66657.797956] [] ? ret_from_intr+0x0/0x11
Oct 16 11:32:28 pcfreak kernel: [66657.797957] [] ? poll_idle+0x28/0x5b
Oct 16 11:32:28 pcfreak kernel: [66657.797963] [] ? poll_idle+0xa/0x5b
Oct 16 11:32:28 pcfreak kernel: [66657.797965] [] ? cpuidle_idle_call+0x94/0xee
Oct 16 11:32:28 pcfreak kernel: [66657.797968] [] ? cpu_idle+0xa2/0xda
Oct 16 11:32:28 pcfreak kernel: [66657.797971] [] ? early_idt_handler+0x0/0x71
Oct 16 11:32:28 pcfreak kernel: [66657.797974] [] ? start_kernel+0x3dc/0x3e8
Oct 16 11:32:28 pcfreak kernel: [66657.797976] [] ?x86_64_start_kernel+0xf9/0x106

and this:


Oct 16 15:53:14 pcfreak kernel: [82297.972509] apache2 invoked oom-killer: gfp_mask=0x200da, order=0, oom_adj=0
Oct 16 15:53:30 pcfreak kernel: [82297.972513] apache2 cpuset=/ mems_allowed=0
Oct 16 15:53:30 pcfreak kernel: [82297.972515] Pid: 8943, comm: apache2 Not tainted 2.6.32-5-amd64 #1
Oct 16 15:53:30 pcfreak kernel: [82297.972517] Call Trace:
Oct 16 15:53:30 pcfreak kernel: [82297.972523] [] ? oom_kill_process+0x7f/0x23f
Oct 16 15:53:30 pcfreak kernel: [82297.972527] [] ? timekeeping_get_ns+0xe/0x2e
Oct 16 15:53:30 pcfreak kernel: [82297.972529] [] ? __out_of_memory+0x12a/0x141
Oct 16 15:53:30 pcfreak kernel: [82297.972531] [] ? out_of_memory+0x140/0x172
Oct 16 15:53:30 pcfreak kernel: [82297.972534] [] ? __alloc_pages_nodemask+0x4ec/0x5fb
Oct 16 15:53:30 pcfreak kernel: [82297.972538] [] ? do_wp_page+0x386/0x707
Oct 16 15:53:30 pcfreak kernel: [82297.972541] [] ? autoremove_wake_function+0x9/0x2e
Oct 16 15:53:30 pcfreak kernel: [82297.972544] [] ? __wake_up_common+0x44/0x72
Oct 16 15:53:30 pcfreak kernel: [82297.972547] [] ? __wake_up+0x30/0x44
Oct 16 15:53:30 pcfreak kernel: [82297.972549] [] ? handle_mm_fault+0x704/0x80f
Oct 16 15:53:30 pcfreak kernel: [82297.972553] [] ? do_page_fault+0x2e0/0x2fc
Oct 16 15:53:30 pcfreak kernel: [82297.972556] [] ? page_fault+0x25/0x30


Oct 16 18:41:55 pcfreak kernel: [ 6582.554746] Mem-Info:
Oct 16 18:41:55 pcfreak kernel: [ 6582.554747] Node 0 DMA per-cpu:
Oct 16 18:41:55 pcfreak kernel: [ 6582.554751] CPU 0: hi: 0, btch: 1 usd: 0
Oct 16 18:41:55 pcfreak kernel: [ 6582.554753] CPU 1: hi: 0, btch: 1 usd: 0
Oct 16 18:41:55 pcfreak kernel: [ 6582.554755] Node 0 DMA32 per-cpu:
Oct 16 18:41:55 pcfreak kernel: [ 6582.554758] CPU 0: hi: 186, btch: 31 usd: 0
Oct 16 18:41:55 pcfreak kernel: [ 6582.554760] CPU 1: hi: 186, btch: 31 usd: 0
Oct 16 18:41:55 pcfreak kernel: [ 6582.554762] Node 0 Normal per-cpu:
Oct 16 18:41:55 pcfreak kernel: [ 6582.554765] CPU 0: hi: 186, btch: 31 usd: 5
Oct 16 18:41:55 pcfreak kernel: [ 6582.554767] CPU 1: hi: 186, btch: 31 usd: 0
Oct 16 18:41:55 pcfreak kernel: [ 6582.554773] active_anon:1580557 inactive_anon:308231 isolated_anon:9504
Oct 16 18:41:55 pcfreak kernel: [ 6582.554775] active_file:148 inactive_file:220 isolated_file:32
Oct 16 18:41:55 pcfreak kernel: [ 6582.554776] unevictable:0 dirty:5 writeback:494 unstable:0
Oct 16 18:41:55 pcfreak kernel: [ 6582.554777] free:12063 slab_reclaimable:4262 slab_unreclaimable:17553
Oct 16 18:41:55 pcfreak kernel: [ 6582.554778] mapped:148 shmem:43 pagetables:89423 bounce:0
Oct 16 18:41:55 pcfreak kernel: [ 6582.554781] Node 0 DMA free:15880kB min:20kB low:24kB high:28kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive
_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:15328kB mlocked:0kB dirty:0kB writeback:0kB mapped:0kB shmem:0kB slab_reclaimable:0kB
slab_unreclaimable:8kB kernel_stack:0kB pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
Oct 16 18:41:55 pcfreak kernel: [ 6582.554794] lowmem_reserve[]: 0 2947 7995 7995
Oct 16 18:41:55 pcfreak kernel: [ 6582.554798] Node 0 DMA32 free:24672kB min:4212kB low:5264kB high:6316kB active_anon:2153732kB inactive_anon:538456kB activ
e_file:32kB inactive_file:56kB unevictable:0kB isolated(anon):6912kB isolated(file):0kB present:3017744kB mlocked:0kB dirty:16kB writeback:336kB mapped:184kB
shmem:168kB slab_reclaimable:4400kB slab_unreclaimable:21908kB kernel_stack:1816kB pagetables:131140kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scann
ed:42 all_unreclaimable? no
Oct 16 18:41:55 pcfreak kernel: [ 6582.554812] lowmem_reserve[]: 0 0 5048 5048
Oct 16 18:41:55 pcfreak kernel: [ 6582.554815] Node 0 Normal free:7700kB min:7216kB low:9020kB high:10824kB active_anon:4168496kB inactive_anon:694468kB acti
ve_file:560kB inactive_file:824kB unevictable:0kB isolated(anon):31104kB isolated(file):128kB present:5169180kB mlocked:0kB dirty:4kB writeback:1640kB mapped
:408kB shmem:4kB slab_reclaimable:12648kB slab_unreclaimable:48296kB kernel_stack:3488kB
pagetables:226552kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_
scanned:224 all_unreclaimable? no
Oct 16 18:41:55 pcfreak kernel: [ 6582.554829] lowmem_reserve[]: 0 0 0 0
Oct 16 18:41:55 pcfreak kernel: [ 6582.554832] Node 0 DMA: 2*4kB 2*8kB 3*16kB 4*32kB 3*64kB 3*128kB 1*256kB 1*512kB 2*1024kB 2*2048kB 2*4096kB = 15880kB
Oct 16 18:41:55 pcfreak kernel: [ 6582.554842] Node 0 DMA32: 114*4kB 73*8kB 273*16kB 256*32kB 85*64kB 10*128kB 1*256kB 0*512kB 0*1024kB 0*2048kB 1*4096kB = 2
4672kB
Oct 16 18:41:55 pcfreak kernel: [ 6582.554852] Node 0 Normal: 867*4kB 103*8kB 7*16kB 13*32kB 7*64kB 1*128kB 1*256kB 0*512kB 0*1024kB 1*2048kB 0*4096kB = 7700
kB
Oct 16 18:41:55 pcfreak kernel: [ 6582.554862] 89702 total pagecache pages
Oct 16 18:41:55 pcfreak kernel: [ 6582.554864] 89257 pages in swap cache
Oct 16 18:41:55 pcfreak kernel: [ 6582.554866] Swap cache stats: add 4155760, delete 4066503, find 618278/801429
Oct 16 18:41:55 pcfreak kernel: [ 6582.554868] Free swap = 0kB
Oct 16 18:41:55 pcfreak kernel: [ 6582.554870] Total swap = 5787636kB
Oct 16 18:41:55 pcfreak kernel: [ 6582.581389] 2096640 pages RAM
Oct 16 18:41:55 pcfreak kernel: [ 6582.581392] 60657 pages reserved
Oct 16 18:41:55 pcfreak kernel: [ 6582.581394] 330845 pages shared
Oct 16 18:41:55 pcfreak kernel: [ 6582.581397] 2012293 pages non-shared

It took, me long time of thinking and pondering what is causing this errors ….
I thought it is due to some failing RAM bank or some kind of conflict URL hardware inconpitability, I had some thoghts that it is possible Hard Disk is failing or have some bad blocks; However as I bought the machine brand new and besides that it is not assembled one PC but brand one Lenovo ThinkEdge, I’ve further thought and investigated if Apache is failing due to some problem with Apache modules. After reviewing all system installed modules, I’ve found php5-suhosin, was installed on the system (probably as a dependency package) to something else I previously installed ??
I don’t have a very positive feedback on some other servers I configured with Apache, whether php5-suhosin was installed so decided to try removing it ….:


# dpkg -r php5-suhosin
.....
# dpkg --purge php5-suhosin

I’ve also lowered down a bit the StartServers and MaxSpareServers (mod_prefork_modules) section in /etc/apache2/apache2.conf:

StartServers there was set to: 700 and MaxSpareServers to 150, I’ve changed the values to read as so:



StartServers 500
MinSpareServers 100
MaxSpareServers 120
MaxClients 1000
MaxRequestsPerChild 10000

Just for info machine is with 8 Gigabytes of Memory and has 1x 2 cores CPU:


# free -m |grep -i 'mem:'
Mem: 7953 7871 81 0 91 753


# cat /proc/cpuinfo |grep -i proces -A 5
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 42
model name : Intel(R) Pentium(R) CPU G630 @ 2.70GHz
stepping : 7
--
processor : 1
vendor_id : GenuineIntel
cpu family : 6
model : 42
model name : Intel(R) Pentium(R) CPU G630 @ 2.70GHz
stepping : 7

After that to make module already loaded in system memory by Apache main (parent) process, I restarted Apache as well:


# apache2ctl -k restart

Following that changes – Thanks God! ; I no longer experience the weird errors and Server overloads 😉

Fixing weird problems with missing File Explorer on Polaroid MPCS700 tablet with Andorid 2.2 (Linux kernel 2.6.32)

Wednesday, October 10th, 2012

Polaroid MPCs700 Tablet Android version 2.2 with 2.6.32 linux kernel picture

I’ve been given Android Polaroid Tablet which had only 5 clickable icons on main (touchscreen) display:

  • Settings
  • Wi-Fi Settings
  • Youtube
  • Browser
  • App market

The shipped in standard applications for Listening Music, Watching Videos, Managing Photos and Browsing files / ( My Photo, My Video, My Music, File Browser) were missing.

Main problem was File Browser by default shipped with Anroid was missing, and if an USB Stick / Flash Drive is plugged in to the USB port, a message appears along with a sound indicating the USB Flash Drive is detected but there was no way to access the USB Flash drive data ….

The tablet is a second hand bought one and is not my own and it appeared like someone has messed up with it trying to change default Android Linux kernel with some “hacked” (custom compiled one?).

The exact Android version installed on it is 2.2, I checked navigating to:


Settings -> About Device

Android 2.2 Polaroid Settings About Device Screenshot pic

Onwards to fix the messed android I had to reset the device to its factory settings by navigating to:


Settings -> Privacy -> Factory data reset

Android 2.2 Polaroid Settings Privacy Reset to Factory Defaults Screenshot

This formats the device and all installed programs and restores the kernel to its original version, so after few minutes of waiting all worked like a charm 🙂

The normal programs for viewing pics, listening music, File Explorer all come at place. Even both VFAT (Fat 32) and NTFS formatted USB drives file systems worked normally with the device. Before that I was puzzled because I suspected the USB Drive is not detected because the kernel is not supporting NTFS and I need to install something. I was wrong just this Factory data reset and NTFS USB bundled by default works as usual 🙂

Fixing video playback issues with VLC Media Player

Tuesday, February 9th, 2010

We are going to fix the chopping, skipping and stutter of the audio with VLC Media Player that sometimes is experienced.
First, open VLC and go to Tools > Preferences. (CTRL+P for those who cant find it)
Hit the Audio tab and change Output: Type to Pulseaudio audio output;
As shown in the picture below:

vlc preferences

Now, change the Show settings option to All and go to Input / Codecs > Access Modules > File ;
Change the caching value to 1500 (there are 1000 milliseconds in a second), 1200 should be okay as well.

vlc preferences

You can adjust this a little higher or lower later. As long as it’s 1000 or above, it should be fine.