Bug 22395

Summary:	radeon : Screen flickers on the right side with visual effects enabled
Product:	xorg	Reporter:	Luca Bonora <dragon_fog>
Component:	Driver/Radeon	Assignee:	xf86-video-ati maintainers <xorg-driver-ati>
Status:	RESOLVED DUPLICATE	QA Contact:	Xorg Project Team <xorg-team>
Severity:	normal
Priority:	medium
Version:	unspecified
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:

Description Luca Bonora 2009-06-21 00:54:31 UTC

With radeon drivers and KDE4 visual effects (or Compiz) enabled the screen flickers only on the right side of the screen. If I disable the effects the issue disappear. I have an ATI X1400 and I'm using Kubuntu 9.04. 
Unfortunately with this issue it's impossible to work with radeon because every single application that use 3d or animation or large textures (I tried the game hedgewars and had the same issue) has this glitches, and latest proprietary drivers have no support for X1400 on Kubuntu Jaunty.

Comment 1 Pauli 2009-06-21 04:29:15 UTC

This is because driver is missing RDR (redirected rendering) support. It will be added to opengl driver with KMS (kernel modesetting) and DRI2. If you don't mind testing code that is  not yet stable you can try Ubuntu live CD from https://launchpad.net/~xorg-edgers/+archive/radeon-kms


Hopefully we will see this fixed in Karmic Koala (9.10).

*** This bug has been marked as a duplicate of bug 9253 ***

Comment 2 Luca Bonora 2009-06-22 02:57:00 UTC

I tried the live CD right now and it works!The issue is fixed!Do you think it's possible to install it on Jaunty?How can I do it?

Comment 3 Pauli 2009-06-22 03:45:14 UTC

You forgot to read the instruction part in that radeon-kms page :)

"If you install these packages on Jaunty (nobody said you should try that), add Driver "ati" to your xorg.conf."

Problem with that is there is still quite a number of outstandting bugs so you might be lucky not to have problems with them or suddenly everything might turn to be unusable.

So if you are ready to be beta tester for new driver that is just about to move to bug fixing. I just want to make sure tht you understand that what is in radeon-kms page. It is alpa/beta quality driver that might just barely be able to make to next Ubuntu release. (and might well have outstanding problem still in October)

Comment 4 Alex Deucher 2009-06-28 09:37:17 UTC

Actually the flickering is probably due to underflow in the display engine due to improper display watermark setup.  I fixed this is git a while ago.  Note, I think the watermark code still needs to be ported to kms.

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