linux-kernel - Re: drm/radeon: white screen after X does modeswitch from KMS con

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Date:	Tue, 14 Feb 2012 09:38:13 -0500
From:	Alex Deucher <alexdeucher@...il.com>
To:	Jan Engelhardt <jengelh@...ozas.de>
Cc:	Alex Deucher <alexander.deucher@....com>,
	Dave Airlie <airlied@...hat.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	dri-devel@...ts.freedesktop.org
Subject: Re: drm/radeon: white screen after X does modeswitch from KMS con

On Mon, Feb 13, 2012 at 9:29 PM, Jan Engelhardt <jengelh@...ozas.de> wrote:
> Hello,
>
>
> the SONY PCG U3 device has a
>
> 00:0c.0 VGA compatible controller [0300]: ATI Technologies Inc Radeon
> Mobility M6 LY [1002:4c59]
>
> graphics card. With linux 3.1.10, X.org server 7.6_1.10.4 and
> xf86-video-ati-6.14.2, switching from KMS'd console to X on tty7
> yields a white screen that also stays when attempting to back to
> tty1.
>
> I have to boot with nomodeset to get a usable Xorg picture.
> Is it just that radeon_drv does not work together with KMS?

It should work fine.  Does it work any better with a newer kernel?  Is
this a regression?  If so, what was the last kernel that was working
properly? Please file a bug:
https://bugs.freedesktop.org
and attach your xorg log and dmesg output.

Alex
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