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Bug#585600: linux-image-2.6.32-5-686: KMS does not detect display resolutions

reopen 585600

Julien Cristau <jcristau@debian.org> writes:

> So in summary your kvm switch doesn't pass edid along, so the kernel has
> no way to know what resolution the monitor supports, so it falls back to
> a presumably safe 1024x768 resolution.  

That would be a possible explanation, yes... however I'm not completely
sure... any way to try and confirm this diagnostic for sure ?

> I don't think there's a bug here, so I suggest you try setting the
> wanted resolution on the kernel command line (video=1280x1024 should
> work).  Closing this bug, thanks for your report.

I'd be perfectly happy to have one bug less open on the kernel, but I
think there's a problem here that is not fixed at all.  Of course, I
could manage to workaround by passing args to the kernel, but that looks
like a regression from end user perspective : how comes that without KMS
things work OK, and with, it doesn't ? Maybe it could be reassigned to
another faulty package ?

Maybe the problem is not with the kernel and with the X driver, then, as
I have :
  Option "IgnoreEDID" "on"
  Option "PanelSize" "1280x1024"
in /etc/X11/xorg.conf

If I get it right, with KMS, if 1280x1024 is not detected as a valid
mode by the kernel, but then, shouldn't the PanelSize setting be
observed anyway by the radeon driver ?

Should I reassign to xserver-xorg-video-radeon instead (I'm reopening
then) ?

Thanks in advance for your opinion.

Best regards,
Olivier BERGER 
(OpenPGP: 1024D/B4C5F37F)

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