Regarding Display wrong EDID information ..Blank display at bootup

[Eric Miao]

On Sat, Oct 30, 2010 at 4:33 AM, Eric Miao <eric.miao at canonical.com> wrote:
> On Sat, Oct 30, 2010 at 4:16 AM, Gursimran singh <simar.i3r at gmail.com> wrote:
>>
>>
>> On Sat, Oct 30, 2010 at 1:23 AM, Eric Miao <eric.miao at canonical.com> wrote:
>>>
>>> On Sat, Oct 30, 2010 at 1:38 AM, Gursimran singh <simar.i3r at gmail.com>
>>> wrote:
>>> > hi,
>>> >   I'm Gursimran singh Mohar. I work for Ubuntu Bug control team. Someday
>>> > I
>>> > hope work for kernel triaging also. I have a display problem that I
>>> > would
>>> > like to share here.
>>> >
>>> > My laptop Sonay vaio(VPC CW 16FG) has Nvidia 230M GPU. The laptop ends
>>> > up in
>>> > a blank display when booted directly into maverick. This is possibly
>>> > caused
>>> > because the driver (nouveau) is not able to read the EDID information of
>>> > the
>>> > display attached to laptop. These are some of the fourms that discus the
>>> > issue ...
>>> >
>>> > http://www.nvnews.net/vbulletin/showthread.php?t=140482&page=5
>>> > http://ubuntuforums.org/showthread.php?t=1470822
>>> >
>>> > I start the computer by adding a 'nomodeset' in the boot parameters(
>>> > ). But
>>> > using mainline kernel
>>> > linux-image-2.6.36-999-generic_2.6.36-999.201010271121_i386 however, I'm
>>> > able to boot into directly. It works absolutely fine. Now I wanted to
>>> > help
>>> > somebody as a tester, if somebody could provide some ubuntu specific
>>> > patch
>>> > work and talk to upstream kernel team about this.
>>> >
>>> > using this linux-image-2.6.36-999-generic_2.6.36-999.201010261121_i386
>>> > and
>>> > all previous the problem perists. I'm attaching some videos that are
>>> > made
>>> > booting from the two kernels.
>>> >
>>>
>>> I think the way to go is to identify which patch fixed this problem, and
>>> see if
>>> that patch qualifies the SRU process.
>>
>> From where you get the information about this patch. I mean, I see the
>> changelog but found no such thing.
>>>
>>> What I suspect is the patch below fixed your problem, but it's more like
>>> a feature-adding patch.
>>>
>>> a6ed76d drm/nouveau: support fetching LVDS EDID from ACPI
>>>
>>> Would be really good if you can get this backported and do some test.
>>
>> I'm just a beginner here. Not much knowledge both of kernel internals as
>> well as working process. But, I guess I can help testing if someone could
>> help me how to..
>>
>> This problem occurs in many Sony vaio laptops and many of then still uses
>> Karmic as it does not have nouveau in it.
>>
>
> Hi Gursimran,
>
> Would you please help file a bug on launchpad, or point the link if
> that's already opened? So that we can track all the details there?
>

Cc'ed the kernel-team, and you can reference the link below if you are new
to bug reporting.

https://help.ubuntu.com/community/ReportingBugs

> Thanks
> - eric
>