[arch-general] linux 3.5 and resolution EDID problem

[Alexandre Ferrando]

On 31 August 2012 06:53, Shridhar Daithankar <ghodechhap at ghodechhap.net> wrote:
> Hello all,
>
> After upgrading to linux-3.5.2, my monitor lost its highest resolution of
> 1360x768 and went to 1024x768 instead.
>
> Downgrading to linux-3.4.9 fixed the issue for the moment.
>
> There are some problems reported with linux-3.5-rc4, such as
> http://lists.freedesktop.org/archives/dri-devel/2012-June/024455.html.
>
> My desktop has Intel Corporation 82G33/G31 Express Integrated Graphics
> controller, which uses i915 module. and I am still experiencing the problem.
>
> However unlike the thread on arch
> forums(https://bbs.archlinux.org/viewtopic.php?pid=1153026), I am not
> experiencing any display corruption.
>
> Anything I can do to fix the problem with linux-3.5?
>
> Thanks
> --
> Regards
>  Shridhar

It's an already reported bug, fix has landed in 3.6-rc3. See [ 0 ] for
more info on the bug and patches to fix it. It will solve the display
issue but you'll still see EDID reporting on dmesg

PS: One of the patches will fail to apply because there is now a
comment block between two instructions on the
drivers/gpu/drm/i915/intel_crt.c file , so you could get the patch
edited to work with 3.5 on my github at [ 1 ] and [ 2 ] for the two
patches you need to apply

[ 0 ] https://bugzilla.kernel.org/show_bug.cgi?id=45881

[ 1 ] https://github.com/alferpal/linux-zen/blob/master/0001-drm-i915-extract-connector-update-from-intel_ddc_get.patch

[ 2 ] https://github.com/alferpal/linux-zen/blob/master/0002-drm-i915-fall-back-to-bit-banging-if-GMBUS-fails-in-.patch

Hope it helps