Bug#529178: xserver-xorg-video-ati: Suffering from this bug + Possible mitigation

[Alex Deucher]

On Wed, Apr 3, 2013 at 2:22 PM, Pablo Oliveira <pablo at sifflez.org> wrote:
> On Wed, Apr 3, 2013 at 3:34 PM, Alex Deucher <alexdeucher at gmail.com> wrote:
>>
>> On Tue, Apr 2, 2013 at 10:04 AM, Pablo Oliveira <pablo at sifflez.org> wrote:
>> > Package: xserver-xorg-video-ati
>> > Version: 1:6.14.4-8
>> > Followup-For: Bug #529178
>> > [...]
>> >
>> > * If I run "xset dpms force off" the problems disappears completely.
>>
>> To clarify, do you mean that after a dpms cycle both monitors work
>> correctly?
>
>
> Yes, after turning off DPMS, both monitors work correctly.
> I have been using the system all day without any flickering problems.
>
>>
>> Does a newer kernel help?  3.2 is pretty old.  There were
>> a number of display related fixes that went into 3.7 for example.
>
>
> I will try with a new kernel and report back.
>
> Also, I would add that, like the other people affected by this bug,
> the problem triggers often when scrolling a window.

Is this the same issue?  I.e., does the blinking come back after a
dpms cycle if you scroll?  If so, it sounds like it may be a bandwidth
issue.  You might try booting with radeon.disp_priority=2 on the
kernel command line in grub.

Alex