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My computer freezes allmost every day. Sometimes just Compiz crashes when I try to open Unity menu. Very often screen just freezes completely and doesn't respond anything. Then I have to restart X. Every time I put my computer standby mode or wake it up I get following error:

kernel: [  271.043895] [drm:gen6_sanitize_pm] *ERROR* Power management discrepancy: GEN6_RP_INTERRUPT_LIMITS expected 16000000, was 12060000

I tried to google the error and I found that updating kernel would help. I tried to install suggested kernel 3.6 and also kernel 3.4. With both kernels standy mode doesn't work at all so I had to switch back to 3.2.0-53-generic. My OS is Ubuntu 12.04 LTS

How could I fix this very anoying problem?

Here is asked information:

tapio@Aspire-3830T:~$ sudo lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)

tapio@Aspire-3830T:~$ sudo uname -a
Linux Aspire-3830T 3.2.0-53-generic #81-Ubuntu SMP Thu Aug 22 21:01:03 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux

tapio@Aspire-3830T:~$ sudo lsb_release -a
LSB Version:    core-2.0-amd64:core-2.0-noarch:core-3.0-amd64:core-3.0-noarch:core-3.1-amd64:core-3.1-noarch:core-3.2-amd64:core-3.2-noarch:core-4.0-amd64:core-4.0-noarch
Distributor ID: Ubuntu
Description:    Ubuntu 12.04.3 LTS
Release:    12.04
Codename:   precise
tapio@Aspire-3830T:~$ sudo dpkg -l | grep xserver-xorg-video-intel
ii  xserver-xorg-video-intel     2:2.19.0-0ubuntu1~xup1                               X.Org X server -- Intel i8xx, i9xx display driver
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  • It seems your graphics problem, The current kernel you are using is not matching with graphics driver you have installed. I want you to paste these commands results by editing your question: sudo lspci | grep VGA, sudo uname -a and sudo lsb_release -a. Reply.. Sep 14, 2013 at 9:22
  • I've added information you asked. Sep 14, 2013 at 9:42
  • Since you are using Ubuntu 12.4.3 I suggest you to use Kernel 3.8.0.30 and the xserver-xorg drivers for lts-raring version. In order to proceed, I want the output of one more command: sudo dpkg -l | grep xserver-xorg-video-intel. To get the information of this command is important. Reply.. Sep 14, 2013 at 17:37
  • Ok. I added that too. Sep 14, 2013 at 19:04
  • Ok, it seems that you are using an ancient Kernel 3.2.x and Old graphics driver. You could solve your problem, but I expect from you to follow them very precisely, and also it is little lengthy. I've solved my issue and I suggested to someone he too solved it. So I recommend you to do it if you've tried all and nothing helped you, and you are willing to give it a try.. Sep 14, 2013 at 19:11

1 Answer 1

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Follow these steps precisely!

  1. Run following command in terminal and tick all check boxes under Ubuntu Software and Updates tabs. If already ticked then leave it.

    sudo software-properties-gtk
    

    then update your repository:

    sudo apt-get update
    
  2. Install Linux Kernel 3.8.0 by selecting following packages in Synaptic:

    linux-generic-lts-raring
    linux-headers-3.8.0-30
    linux-headers-3.8.0-30-generic
    linux-headers-generic-lts-raring
    linux-image-3.8.0-30-generic
    linux-image-generic-lts-raring
    

    you can also install Kernel 3.8.x by executing following command:

    sudo apt-get install linux-generic-lts-raring linux-headers-3.8.0-30 linux-headers-3.8.0-30-generic linux-headers-generic-lts-raring linux-image-3.8.0-30-generic linux-image-generic-lts-raring
    

    Once installed execute following command to update-grub and reboot your system(be sure to select Kernel 3.8.0.30 from your grub menu):

    sudo update-grub && sudo reboot
    

    Before trying to 3rd step I just want you to try 4th step. If it fixes your problem then no need to install latest Xserver-Xorg packages so you can skip 3rd step.

  3. Install all -lts-raring packages for Xserver-Xorg using following command:

    sudo apt-get install libgl1-mesa-dri-lts-raring libxatracker1-lts-raring xserver-xorg-core-lts-raring xserver-xorg-input-all-lts-raring xserver-xorg-input-evdev-lts-raring xserver-xorg-input-mouse-lts-raring xserver-xorg-input-synaptics-lts-raring xserver-xorg-input-vmmouse-lts-raring xserver-xorg-input-wacom-lts-raring xserver-xorg-lts-raring xserver-xorg-video-all-lts-raring xserver-xorg-video-ati-lts-raring xserver-xorg-video-cirrus-lts-raring xserver-xorg-video-fbdev-lts-raring xserver-xorg-video-intel-lts-raring xserver-xorg-video-mach64-lts-raring xserver-xorg-video-mga-lts-raring xserver-xorg-video-modesetting-lts-raring xserver-xorg-video-neomagic-lts-raring xserver-xorg-video-nouveau-lts-raring xserver-xorg-video-openchrome-lts-raring xserver-xorg-video-r128-lts-raring xserver-xorg-video-radeon-lts-raring xserver-xorg-video-s3-lts-raring xserver-xorg-video-savage-lts-raring xserver-xorg-video-siliconmotion-lts-raring xserver-xorg-video-sis-lts-raring xserver-xorg-video-sisusb-lts-raring xserver-xorg-video-tdfx-lts-raring xserver-xorg-video-trident-lts-raring xserver-xorg-video-vesa-lts-raring xserver-xorg-video-vmware-lts-raring libxrandr-ltsq2 x11-xserver-utils-lts-raring xserver-common-lts-raring
    

    Why this list is so long because I ensure that you install all lts-raring packages for xserver-xorg. I recommend you to copy and paste it in terminal. It will remove already installed Xserver-Xorg packages which was meant for previous kernel. so press y when it prompts to remove such packages.. Run this command to ensure you installed all:

    sudo apt-get install --install-recommends xserver-xorg-lts-raring
    

    restart your system.

  4. Now execute following commands:

    sudo apt-get autoremove
    sudo apt-get autoclean
    sudo dpkg-reconfigure -a
    sudo dpkg-reconfigure $(dpkg -l | awk '{print $2}' | grep "^xserver" | tr '\n' ' ')
    

    If last step shows some error, then execute these commands sudo apt-get -f install, sudo apt-get --purge remove, sudo apt-get autoremove && sudo apt-get autoclean.

    Then again try to run the command that gives you error. If still it gives you the same error then replace that command with this one: sudo dpkg-reconfigure $(dpkg -l | awk '{print $2}' | grep 'lts-raring' | tr '\n' ' ').

    Then continue to next:

    sudo update-initramfs -u
    

    Then restart your system again:

    sudo reboot
    
  5. After reboot your system should work great.

A short description of all steps mentioned above:

1st Step ensures that you'll able to download lts-raring packages.

In 2nd step you are installing a good stable kernel for your system, you are using so old kernel: 3.2.x.

3rd Step will install Xserver-Xorg packages including graphics card driver which is best supported by Kernel 3.8.0

4th Step is used to re-configure the packages installed in your system to latest kernel just you installed.

It is not that much tough, I did it without any problem. And my system works great now! If you get any problem or error at any particular step, just reply mentioning that command with the error. I'll be waiting for your reply..

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  • Now I don't get error message anymore and also standby-mode works. I'm not sure about crashes yet but I'll answer if it this crashes again. Thank you! Sep 15, 2013 at 9:01

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