Launchpad has imported 19 comments from the remote bug at https://bugs.freedesktop.org/show_bug.cgi?id=31901.
If you reply to an imported comment from within Launchpad, your comment will be sent to the remote bug automatically. Read more about Launchpad's inter-bugtracker facilities at https://help.launchpad.net/InterBugTracking. ------------------------------------------------------------------------ On 2010-11-24T19:06:35+00:00 Robert Hooker wrote: Forwarding this bug from Ubuntu reporter Dagfinn Ilmari Mannsåker: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/680748 [Original bug report] Since upgrading to Maverick, the display on my ThinkPad X201s flickers when viewing stripy patterns, like the attached image. I tried upgrading to the latest xorg-edgers (including the 2.6.37 kernel), without any improvement. DistroRelease: Ubuntu 10.10 DRM.card0.LVDS.1: status: connected enabled: enabled dpms: On modes: 1440x900 edid-base64: AP///////wAwrhRAAAAAADQTAQOAGhB46uWVk1ZPkCgoUFQAAAABAQEBAQEBAQEBAQEBAQEB8BygoFCEGjAYEDYABaMQAAAY8BygoFCEGjAYEDYABaMQAAAYAAAADwCVCjKVCjIZAQAwZABVAAAA/gBMVEQxMjFFUTNCCiAgAIg= dmi.product.name: 5129CTO dmi.product.version: ThinkPad X201s dmi.sys.vendor: LENOVO dmi.bios.version: 6QET44WW (1.14 ) kernel: 2.6.35-23.40-generic 2.6.35.7 (2.6.37-rc3 also tested) libdrm: 2.4.21-1ubuntu2.1 (2.4.22+git20101122.51b89504-0ubuntu0sarvatt~maverick also tested) mesa: 7.9~git20100924-0ubuntu2 (7.10.0+git20101122.93102b4c-0ubuntu0sarvatt~maverick also tested) xf86-video-intel: 2:2.12.0-1ubuntu5.1 (2:2.13.901+git20101117.33c08882-0ubuntu0sarvatt~maverick also tested) 00:02.0 VGA compatible controller [0300]: Intel Corporation Core Processor Integrated Graphics Controller [8086:0046] (rev 02) (prog-if 00 [VGA controller]) Subsystem: Lenovo Device [17aa:215a] Reply at: https://bugs.launchpad.net/xserver-xorg-video- intel/+bug/680748/comments/2 ------------------------------------------------------------------------ On 2010-11-24T19:08:06+00:00 Robert Hooker wrote: Created attachment 40552 dmesg from problematic boot Reply at: https://bugs.launchpad.net/xserver-xorg-video- intel/+bug/680748/comments/3 ------------------------------------------------------------------------ On 2010-11-24T19:08:41+00:00 Robert Hooker wrote: Created attachment 40553 Xorg.0.log from problematic boot Reply at: https://bugs.launchpad.net/xserver-xorg-video- intel/+bug/680748/comments/4 ------------------------------------------------------------------------ On 2010-11-24T19:09:17+00:00 Robert Hooker wrote: Created attachment 40554 Image which exhibits the problem Reply at: https://bugs.launchpad.net/xserver-xorg-video- intel/+bug/680748/comments/5 ------------------------------------------------------------------------ On 2010-11-24T22:08:59+00:00 Dagfinn Ilmari Mannsåker wrote: Created attachment 40558 intel_reg_dumper output with flicker Reply at: https://bugs.launchpad.net/xserver-xorg-video- intel/+bug/680748/comments/7 ------------------------------------------------------------------------ On 2010-11-24T22:20:52+00:00 Dagfinn Ilmari Mannsåker wrote: Created attachment 40559 intel_reg_dumper output without flicker Using an Ubuntu 10.04.1 live image, I see no flickering. kernel: 2.6.32-24-generic 2.6.32.12 libdrm: 2.4.18-1ubuntu3 mesa: 7.7.1-1ubuntu3 xf86-video-intel: 2:2.9.1-3ubuntu5 Reply at: https://bugs.launchpad.net/xserver-xorg-video- intel/+bug/680748/comments/8 ------------------------------------------------------------------------ On 2010-12-06T10:53:25+00:00 Chris Wilson wrote: The difference appears to simply be that in the working setup all 4 fdi lanes are used, whereas in the stripy broken setup, just 1 lane. This suggests that we are running too close to the bandwidth limit on a single lane. On drm-intel-fixes, I've tweaked the fdi m/n calculation which may help, but that uses the same computed number of lanes. Can you first try that branch and then (if it still fails) apply this tweak to print out the details of the computation and up the lane count to 2 (increase to 3 and then 4 until the display is stable): diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_d index d9b7092..a9645fb 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -3790,6 +3790,9 @@ static int intel_crtc_mode_set(struct drm_crtc *crtc, */ u32 bps = target_clock * bpp * 21 / 20; lane = bps / (link_bw * 8) + 1; + printk(KERN_ERR "target=%d, bpp=%d, bps=%d, link_bw=%d, + target_clock, bpp, bps, link_bw, lane); + lane = 2; } intel_crtc->fdi_lanes = lane; Reply at: https://bugs.launchpad.net/xserver-xorg-video- intel/+bug/680748/comments/9 ------------------------------------------------------------------------ On 2010-12-07T23:00:19+00:00 Dagfinn Ilmari Mannsåker wrote: Created attachment 40887 intel_reg_dumper output with forced lanes=4 The patch made no difference, even with lane = 4. The calculation comes out as target=74080, bpp=18, bps=1400112, link_bw=270000, lanes=1 Attached is the intel_regs_dumper output with lane = 4 Reply at: https://bugs.launchpad.net/xserver-xorg-video- intel/+bug/680748/comments/10 ------------------------------------------------------------------------ On 2010-12-15T19:49:05+00:00 Chris Wilson wrote: So all the registers that are dumped are the same. The stripy pattern is reminiscent of CxSR/FBC failure, but I can rule that out as you found the same issue on 2.6.37-rc3. I am back to being stumped, x201s happens to be our favourite laptop so is well tested... The only thing left to test is whether any of the fixes in drm-intel-fixes/drm-intel-next help. The LVDS SSC frequency fix might be relevant, but the symptom for that one is a failure to enable the pipe, i.e. a blank screen as opposed to stripy. Reply at: https://bugs.launchpad.net/xserver-xorg-video- intel/+bug/680748/comments/11 ------------------------------------------------------------------------ On 2010-12-15T21:37:55+00:00 Dagfinn Ilmari Mannsåker wrote: Created attachment 41156 intel_reg_dumper output with drm-intel-next I still get flicker with drm-intel-next (using the amd64 package from http://kernel.ubuntu.com/~kernel-ppa/mainline/drm-intel- next/2010-12-15-natty/) Reply at: https://bugs.launchpad.net/xserver-xorg-video- intel/+bug/680748/comments/12 ------------------------------------------------------------------------ On 2010-12-15T22:20:46+00:00 Chris Wilson wrote: Ok, that doesn't yet have the SSC refclk fix, which is my remaining hope. I haven't yet merged that from -fixes into -next. If that fails, we have two choices: (1) randomly disable bits until it works or (2) bisect and hope to find a single rogue commit. Reply at: https://bugs.launchpad.net/xserver-xorg-video- intel/+bug/680748/comments/13 ------------------------------------------------------------------------ On 2010-12-27T22:34:23+00:00 Dagfinn Ilmari Mannsåker wrote: (In reply to comment #10) > Ok, that doesn't yet have the SSC refclk fix, which is my remaining hope. I > haven't yet merged that from -fixes into -next. If that fails, we have two > choices: (1) randomly disable bits until it works or (2) bisect and hope to > find a single rogue commit. If by "the SSC refclk fix" you mean "drm/i915/bios: Reverse order of 100/120 Mhz SSC clocks", that did not fix it. I'm currently running 608ca70d22c0ea0d52aa71f52b8e326055c274d1 (http://kernel.ubuntu.com /~kernel-ppa/mainline/drm-intel-next/2010-12-24-natty/) and still see the flickering. Reply at: https://bugs.launchpad.net/xserver-xorg-video- intel/+bug/680748/comments/14 ------------------------------------------------------------------------ On 2010-12-27T22:50:58+00:00 Dagfinn Ilmari Mannsåker wrote: Created attachment 41479 intel_reg_dumper output with drm-intel-next as of 608ca70d Reply at: https://bugs.launchpad.net/xserver-xorg-video- intel/+bug/680748/comments/15 ------------------------------------------------------------------------ On 2011-01-19T13:52:46+00:00 Chris Wilson wrote: I've tuned the watermarks to account for TLB misses, and we've tweaked the SSC settings. Can you please test drm-intel-next [http://git.kernel.org/?p=linux/kernel/git/ickle/drm-intel.git]? Reply at: https://bugs.launchpad.net/xserver-xorg-video- intel/+bug/680748/comments/16 ------------------------------------------------------------------------ On 2011-07-29T09:44:19+00:00 Chris Wilson wrote: Hmm, can you please retest with drm-intel-fixes for this commit 2704cf5fbd248871a745d210733c6319959d2b0c Author: Jesse Barnes <jbar...@virtuousgeek.org> Date: Thu Jul 28 11:52:45 2011 -0700 drm/i915: flush plane control changes on ILK+ as well After writing to the plane control reg we need to write to the surface reg to trigger the double buffered register latch. On previous chipsets, writing to DSPADDR was enough, but on ILK+ DSPSURF is the reg that triggers the double buffer latch. v2: write DSPADDR too to cover pre-965 chipsets v3: use flush_display_plane instead, that's what it's for v4: send the right patch Signed-off-by: Jesse Barnes <jbar...@virtuousgeek.org> Tested-by: Keith Packard <kei...@keithp.com> Reviewed-by: Keith Packard <kei...@keithp.com> Signed-off-by: Keith Packard <kei...@keithp.com> fixed the flickering on one Arrandale eDP which might be related, along with plenty of other fixes. Reply at: https://bugs.launchpad.net/xserver-xorg-video- intel/+bug/680748/comments/18 ------------------------------------------------------------------------ On 2011-07-29T15:26:21+00:00 Dagfinn Ilmari Mannsåker wrote: Which repository is that commit available in? I can't find it in http://git.kernel.org/?p=linux/kernel/git/ickle/drm-intel.git, and Google doesn't know about the SHA1. Reply at: https://bugs.launchpad.net/xserver-xorg-video- intel/+bug/680748/comments/19 ------------------------------------------------------------------------ On 2011-07-29T15:31:27+00:00 Chris Wilson wrote: My apologies, I thought I had included the address in the cases where it did not appear before: git://git.kernel.org/pub/scm/linux/kernel/git/keithp/linux-2.6.git Reply at: https://bugs.launchpad.net/xserver-xorg-video- intel/+bug/680748/comments/20 ------------------------------------------------------------------------ On 2011-08-23T12:17:04+00:00 Dagfinn Ilmari Mannsåker wrote: Finally got around to testing with the kernel at http://kernel.ubuntu.com/~kernel-ppa/mainline/drm-intel-next/2011-07-30-oneiric/, which is built from commit 9b546e571b94cacccf1091cc9cc0bd8a6a207a66 and contains 2704cf5fbd248871a745d210733c6319959d2b0c, but I'm still seeing the flickering. Reply at: https://bugs.launchpad.net/xserver-xorg-video- intel/+bug/680748/comments/21 ------------------------------------------------------------------------ On 2012-04-14T17:09:44+00:00 Daniel-ffwll wrote: Can you please retest with latest stable kernel (3.3 at this moment) and also please test whether adding i915.lvds_use_ssc=0 to your kernel bootline helps. In any case, please add drm.debug=0xe to your kernel bootline and attach the full dmesg. Reply at: https://bugs.launchpad.net/xserver-xorg-video- intel/+bug/680748/comments/22 ** Changed in: xserver-xorg-video-intel Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/680748 Title: [arrandale] flicker on LVDS laptop display with stripy patterns To manage notifications about this bug go to: https://bugs.launchpad.net/xserver-xorg-video-intel/+bug/680748/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
