Bug 30025 - r600 kms, massave slowdown with latest drm-radeon-testing
Summary: r600 kms, massave slowdown with latest drm-radeon-testing
Status: RESOLVED DUPLICATE of bug 29972
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/Radeon (show other bugs)
Version: XOrg git
Hardware: x86-64 (AMD64) Linux (All)
: medium normal
Assignee: Default DRI bug account
QA Contact:
Depends on:
Reported: 2010-09-05 02:56 UTC by aaron
Modified: 2010-09-05 05:33 UTC (History)
0 users

See Also:
i915 platform:
i915 features:


Description aaron 2010-09-05 02:56:33 UTC
ive bisected to this commit:

odd thing i noted:
if i run compiz with vblank_mode=0 and run glxgears  it reports a frame-rate of about 1500 fps ( being the same as i get when running the previous revision kernel) but its still looks as slow as molasses
if i unset vblank_mode then run it it reports about 5 fps but looks the same as before
Comment 1 Tobias Jakobi 2010-09-05 04:06:47 UTC
I think this one is well knows, have you tried disabling writeback with no_wb=1 as radeon module parameter?

Also note that gears is _not_ a benchmark.
Comment 2 aaron 2010-09-05 05:05:55 UTC
yep passing radeon.no_wb=1 to the kernel fixes it

@glxgears i kinda expected that but i don't think im using it for one...
im just trying to show the difference between reported and apparent frame-rate in certain situations - it just seems odd...
Comment 3 Andy Furniss 2010-09-05 05:33:47 UTC
More info + patch in


*** This bug has been marked as a duplicate of bug 29972 ***

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