nouveau doesn't initializes LVDS correctly

[dac922]

After upgrading to Lubuntu 13.04 (actual kernel 3.8.0-19) my notebook display shows some undefined crap.

Rebuilding nouveau.ko with following patch

https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/commit/drivers/gpu/drm/nouveau/core/subdev/bios/init.c?id=f6853faa85793bf23b46787e4039824d275453c2

and replacing to old nouveau.ko in /lib/modules.. and initrd fixed this issue.

[Brad Figg (brad-figg)]

This bug is missing log files that will aid in diagnosing the problem. From a terminal window please run:

apport-collect 1174088

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[dac922 (dac922)]

It makes not much sense to attach logs, since there are no error messages, warnings or alike. The display of my notebook just displays crap (tty and xorg). If starting with nomodeset, the display works with tty, but still not with xorg. After applying the patch above the display works with tty and xorg (without nomodeset set).

My notebook is a Medion M795 with NV18 graphics card.

[Joseph Salisbury (jsalisbury)]

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v3.9 kernel[0].

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream'.
Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.9-raring/

[dac922 (dac922)]

Works with http://cdimage.ubuntu.com/lubuntu/daily-live/current/

However, I clearly pointed to the patch that fixes this issue. It's fixed in upstream since 3.9.x, and it's still fixed with 3.11. If you are willing to fix this bug for Ubuntu 13.04, please backport the patch to Ubuntu's 3.8 kernel.

[penalvch (penalvch)]

dac922, thank you for taking the time to report this bug and helping to make Ubuntu better. However, I am closing it because the bug has been fixed in the latest development version of Ubuntu - Saucy Salamander.

This is a significant bug in Ubuntu. If you need a fix for the bug in previous versions of Ubuntu, please perform as much as possible of the SRU Procedure [1] to bring the need to a developer's attention.

[1]: https://wiki.ubuntu.com/StableReleaseUpdates#Procedure