** Description changed:
In jaunty alpha3, OpenGL applications seemed to work very well with
composite enabled, even glxgears on cube worked. In googleearth the GL
window didn't interfere with menus and popup windows. The graphical
- environment on my Mobility radeon X700 gave a sense of a well polished
- system. The only drawback has been the worse performance. glxgears
- reported 10 times less FPS but googleearth (which I consider as e better
- criterion for the 3D-performance) was just a bit slower and definitely
- still usable. In this status I took the attached screenshot A.
+ environment on my Mobility radeon X700 gave the feeling of a well
+ polished system. The only drawback has been the worse performance.
+ glxgears reported 10 times less FPS but googleearth (which I consider as
+ e better criterion for the 3D-performance) was just a bit slower and
+ definitely still usable. In this status I took the attached screenshot
+ A.
After the update to mesa (7.3~rc3-1ubuntu1), the performance-regression has
been fixed but 3D applications, started to flicker once again, like they used
to do in intrepid. I suppose this issue is related with
" * Drop 102_dont_vblank.patch, since the new drm code in the kernel fixes
the bugs that it worked around."
from changelog. After the update I took the attached screenshot B showing the
overlapping between the GL-window and a popup window.
As a user I would prefer a default configuration that works well but
slower, than a configuration that works faster but with obvious defects
to make me disable composite. On my X700 graphic card the speed drawback
before the update wasn't really essential. At least with the
applications I tested.
This is my hardware information:
01:00.0 VGA compatible controller [0300]: ATI Technologies Inc Radeon
Mobility X700 (PCIE) [1002:5653]
Subsystem: Acer Incorporated [ALI] Device [1025:0066]
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort-
<MAbort- >SERR- <PERR- INTx-
Latency: 0, Cache Line Size: 32 bytes
Interrupt: pin A routed to IRQ 16
Region 0: Memory at d0000000 (32-bit, prefetchable) [size=128M]
Region 1: I/O ports at 3000 [size=256]
Region 2: Memory at c8100000 (32-bit, non-prefetchable) [size=64K]
[virtual] Expansion ROM at c8120000 [disabled] [size=128K]
Capabilities: <access denied>
ProblemType: Bug
Architecture: i386
DistroRelease: Ubuntu 9.04
Package: libgl1-mesa-dri 7.3~rc3-1ubuntu1
ProcEnviron:
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: mesa
Uname: Linux 2.6.28-5-generic i686
--
Flikering in OpenGL applications with composite in radeon
https://bugs.launchpad.net/bugs/321108
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