Mailinglist Archive: radeonhd (364 mails)

[kristof <cakristof@xxxxxxxxx>]

On Tue, Mar 17, 2009 at 12:14 PM, Daniel Troeder <daniel@xxxxxxxxxxxxx> wrote:

> Now the problem: I have a 24"-TFT (Benq FP241W) with native 1920x1200
> res. When connecting through VGA (sub-d) everything's fine, but when I
> connect through my notebooks HDMI I have a problem. Ah - first: the TFT
> does only support HDMI-1.1, so that it's only possible to use until
> 1920x1080 :( , but it has a DVI-D-connector, so I use a
> HDMI-2-DVI-cable. With the fglrx-driver (in Ubuntu) it works with
> 1920x1200, but with radeonhd something strage happens:
>
> I get the full resolution, but the ext. screen goes
> on-and-off-and-on-and-off.... but only at 1920x1200, all lower
> resolutions until (incl.) 1680x1050 and 1600x1200 work perfectly. The
> notebook panel is not affected, /var/log/Xorg.0.log is flooded with EDID
> and Modeline infos each time the TFT goes on-and-off.
> Funny thing: the more movement on screen, the faster the screen goes
> off. If nothing moves, it may take 20 sec until the screen goes off (and
> on again), with a running video or scrolling in firefox it happens
> immediately. If I change the resolution some more times, the ext.screen
> stays black forever at 1920x1200, while the lower resolutions keep
> working.

That's the flashing screen bug I reported a while back:
https://bugs.freedesktop.org/show_bug.cgi?id=20047

When I originally made the report I hadn't tried resolutions other
than 1920x1200.  I've just spent a few minutes playing around with
resolutions and it seems that the flashing only occurs when my primary
DVI is at 1920x1200.

I'll do some further testing before updating the bug report.

I'm still experiencing the problem with these recent commits:

radeonhd 9c8f9ce4aabc7c1a85e4f015c6b19bde4f96866
DRM      3085912035f3c37cfcf3df91af9e2c44ad29438e

I'm available to help with debugging, patch testing, etc.
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