Forwarding this bug from Ubuntu reporter Gegio0: http://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/374413 [Problem] In testing a recent git snapshot of -ati under virtualbox, it was found to cause very bad flickering. No flickering is seen when running with a regular install with no virtualbox. [Original Description] I have a LG M227WD widescreen monitor and an integrated ati X1250-based graphics in my Gigabyte MA69GM-S2H motherboard; monitor and graphics are connected through an HDMI cable. When I am in ubuntu (9.04, fully updated) my monitor blinks to black very often (usually every 3 seconds, but sometimes it blinks even 3-4 times in fast succession) and remains black for about 1 second (again, sometimes it stays black for way more seconds). On the same machine I have a windows xp installation that works just fine. Problem seems not to arise in gdm login screen. I have no xorg.conf file. Please, consider that this is rendering the ubuntu side of my machine nearly unusable. I've tested the 1:6.12.99+git20090825.fc74e119 packet for a dozen of hours and I can now say that: * flickering is almost gone (apart from one flicker just after upgrading and another after a restart, I've seen no other flickering) for classic usage; but * flickering is much worse now using virtualbox (I use a windows xp with virtualbox guest additions). Architecture: i386 DistroRelease: Ubuntu 9.04 Package: xorg 1:7.4~5ubuntu18 ProcEnviron: LANG=en_US.UTF-8ProcVersion: Linux versusernamen 2.6.28-11-generic (buildd@palmer) (gcc versusernamen 4.3.3 (Ubuntu 4.3.3-5ubuntu4) ) #42-Ubuntu SMP Fri Apr 17 01:57:59 UTC 2009 SourcePackage: xorg Uname: Linux 2.6.28-11-generic i686 [lspci] 00:00.0 Host bridge [0600]: ATI Technologies Inc RS690 Host Bridge [1002:7910] Subsystem: Giga-byte Technology Device [1458:5000] 01:05.0 VGA compatible controller [0300]: ATI Technologies Inc RS690 [Radeon X1200 Series] [1002:791e] Subsystem: Giga-byte Technology Device [1458:d001]
Created attachment 29144 [details] [review] Xorg.0.log
Created attachment 29145 [details] dmesg
Is the driver being run as a host or guest when the flickering happens? If it's a guest, It sounds like it may be a virtualbox issue. With the latest driver bits from git master, the following option may help: Option "DisplayPriority" "HIGH" in the device section of your config.
(In reply to comment #3) > Is the driver being run as a host or guest when the flickering happens? The drive runs as a host: I have an ubuntu machine running a windows xp (32 bits) virtual machine (w/ virtualbox guest additions 3.0.4r50677). > With the latest > driver bits from git master, the following option may help: > Option "DisplayPriority" "HIGH" > in the device section of your config. I'm going to try this today.
> > With the latest > > driver bits from git master, the following option may help: > > Option "DisplayPriority" "HIGH" > > in the device section of your config. > > I'm going to try this today. > Sorry for the wait: I was really busy. Setting that options hasn't helped. I've tried to disable DPMS (sudo xset -dpms) and I've seen only a couple of blinks in the past three hours.
So without virtualbox no problem ? I am not sure i understand the setup you said you were testing git snapshot under virtualbox ? So how is the computer setup: -host windows/linux ? which version ? which driver ? which driver version ? -guest windows/linux ? which version ? which driver ?
First of all: I've tested "xset -dpms" for a few days and I can say that isn't working. > So without virtualbox no problem ? I'm experiencing the same problem with and without virtualbox running. With virtualbox running, the frequency of the problem is much higher. > I am not sure i understand the setup you said you were testing git snapshot > under virtualbox ? So how is the computer setup: > > -host windows/linux ? which version ? which driver ? which driver version ? > -guest windows/linux ? which version ? which driver ? I'm running a fully updated ubuntu karmic (virtualbox-ose 3.0.6, xserver-xorg-video-ati 6.12.99+git20090825.fc74e119) as the host with a windows xp guest (fully updated and with virtualbox-guest-additions 3.0.6). Please note that the whole screen blinks, not only the guest.
can you try with ati from git master? Specifically commit 66b194a78c470cb3978f310828dd96c3f3e96944.
Closing due to lack of feedback.
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