Messages in this thread | | | Date | Fri, 2 Oct 2009 15:44:24 -0700 | From | Jesse Barnes <> | Subject | Re: 2.6.32 regression (bisected): Video tearing/glitching with T400 laptops |
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On Fri, 02 Oct 2009 18:40:27 -0400 "Theodore Ts'o" <tytso@mit.edu> wrote:
> Hi, > > In recent kernels, my X display (running with a KMS-enabled X server) > has been very jittery and with lots of glitching and tearing --- sorry > if this isn't the correct technical term, not sure what it is --- on > my T400 Lenovo laptop. It seems related to what is on the desktop, > and moving the mouse does seem to affect the rate and percentage of > the screen which jitters --- which is enough to be very distracting, > although I can still read the contents of the windows where the screen > is tearing/glitching/flashing. > > I bisected it down to this commit: > > 74dff282237ea8c0a5df1afd8526eac4b6cee063 is the first bad commit > commit 74dff282237ea8c0a5df1afd8526eac4b6cee063 > Author: Jesse Barnes <jbarnes@virtuousgeek.org> > Date: Mon Sep 14 15:39:40 2009 -0700 > > drm/i915: framebuffer compression for GM45+ > > Add support for framebuffer compression on GM45 and above. > Removes some unnecessary I915_HAS_FBC checks as well (this is now > part of the FBC display function). > > Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org> > Signed-off-by: Eric Anholt <eric@anholt.net> > > ... and taking the latest git mainline, and I confirmed that the > problem was still present, and then after reverting this commit, the > problem went away. > > I've included my Xorg.0.log file in case that's helpful. Please let > me know if there's anything else you need.
Yeah I've had a couple of other reports of flicker pointing to this commit... I'll be able to look into it next week.
-- Jesse Barnes, Intel Open Source Technology Center
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