Xv has color glitches with radeon driver

Pat Kane pekane52 at gmail.com
Tue Jul 27 17:43:48 PDT 2010

 > I'm pretty sure I don't have superhuman vision :-P  They're there, I can see
 > them quite clearly.  Maybe your monitor is too dark or too low contrast?

On my display I might be able to see the artifacts that you mention, but it
is hard to tell since I do not know what the correct image should be.

There are 3 very subtle horizontal bands near the bottom of the image
that might be part of the background or maybe not...

On Tue, Jul 27, 2010 at 7:37 PM, Nikos Chantziaras <realnc at arcor.de> wrote:
> On 07/28/2010 01:46 AM, Alex Deucher wrote:
>> On Tue, Jul 27, 2010 at 6:10 PM, Nikos Chantziaras<realnc at arcor.de>
>>  wrote:
>>> I'm not exactly sure when the problem first occurred, but it's been quite
>>> a
>>> while, definitely more than 6 months.  Here's a screenshot of the
>>> problem:
>>> http://i25.tinypic.com/2vkxrh3.png
>> Are you sure you uploaded the right image?  I don't see any bars in that
>> image,
> I'm pretty sure I don't have superhuman vision :-P  They're there, I can see
> them quite clearly.  Maybe your monitor is too dark or too low contrast?
>>> This is with mplayer using Xv, on standard definition video in
>>> fullscreen.
>>>  Note the gree, red and blue color bars at the bottom.  They always
>>> appear,
>>> but naturally, they're most visible in dark scenes.  It's not an mplayer
>>> bug
>>> it seems, since pausing the video and going out of fullscreen and then
>>> back
>>> makes them go away temporarily.  Also, they never appear with AMD's
>>> binary
>>> fglrx driver or on non-radeon cards.
>>> The problem, as I mentioned already, is an old one.  Right now, I'm at:
>>> Radeon HD4870
>>> kernel 2.6.35_rc6
>>> xf86-video-ati Git master
>>> Mesa Git master
>>> X server Git master
>> Does it happen with any other movie players (totem, vlc, etc.)?
> Didn't try totem, but it happens with VLC too.
>> If it
>> is a driver bug, can you bisect xf86-video-ati to see when the problem
>> was introduced?
> I don't know which version introduced this; I guess I'll have to start
> trying them all.
> One thing I didn't mention is that the problem only appears when the video
> is being scaled.  Watching in windowed mode (1:1 ratio) never triggers it.
>  Only when zooming or going full-screen.
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