linux-kernel - Re: radeon 4830 corruption after resume

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Date:	Mon, 14 Dec 2009 13:28:35 +0800
From:	Xiaotian Feng <xtfeng@...il.com>
To:	Alex Chiang <achiang@...com>
Cc:	Dave Airlie <airlied@...hat.com>, rjw@...k.pl,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: radeon 4830 corruption after resume

On Mon, Dec 14, 2009 at 11:11 AM, Alex Chiang <achiang@...com> wrote:
> * Dave Airlie <airlied@...hat.com>:
>> On Sun, 2009-12-13 at 19:30 -0700, Alex Chiang wrote:
>> > Hi Dave, Rafael,
>> >
>> > I can successfully suspend/resume my HP Envy, but upon resume,
>> > the screen is corrupted.
>> >
>> > I used the gnome screenshot utility to capture this:
>> >
>> >     http://chizang.net/alex/tmp/radeon-4830-corruption.png
>> >
>> > But that screenshot leads you to believe the corruption was
>> > 100%, when in reality, the text in my xterms was at least
>> > readable, but ugly.
>> >
>> > Kernel is latest upstream pulled today. Userspace is Ubuntu Karmic.
>>
>> Has it ever worked? can you suspend/resume without X running at all?
>
> Hm, define "worked"?
>
> The machine responds to keyboard, mouse, network input, etc. It's
> just that the screen is garbled.
>

Then how about ssh to your machine, and get dmesg output?

> Unless I'm not understanding what you're asking?
>
>> Its quite possibly a userspace problem but its hard to know, we
>> haven't changed the user modesetting pieces in the kernel at all in
>> quite a while.
>
> Ok, I'm just looking for where/how to start debugging. Any advice
> on where to look next would be fine too.
>
> Thanks,
> /ac
>
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