[Bug 93417] xf86-video-ati [mobility radeon x2300] driver does not identify LVDS "no monitor specified"

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Thu Dec 17 11:48:45 PST 2015


--- Comment #6 from Kokodu <shcom7 at gmail.com> ---
(In reply to Alex Deucher from comment #4)
> The LVDS is detected as an 1280x800 panel.  Does it seem like a backlight
> issue?  Is this a regression? I think so. 

> If so when did it used to work? It worked with older kernel versions. To give an example, I attached the Xorg.0.log of a debianoid live system with older kernel, driver and Xorg server.

> Can you try
> setting radeon.backlight=0 on the kernel command line in grub to disable
> driver backlight control.  You might be seeing a regression as a result of
> this patch:
> http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/
> ?id=4281f46ef839050d2ef60348f661eb463c21cc2e
> which was fixed in:
> http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/
> ?id=4cee6a9057d5e13911f0cb6e143d11dc1a3245dd
> http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/
> ?id=ae93580ee59c02395c1711d3e6b90546b8137b86

Will try and set in jiffy.

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