** No longer affects: xserver-xorg-video-ati (Ubuntu)
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https://bugs.launchpad.net/bugs/915408
Title:
Garbled display on external screen when using 1920x1080 inste
A patch referencing this bug report has been merged in Linux v3.3-rc7:
commit 38aa4a568ba4c3ccba83e862a01e3e60e3b811ee
Author: Alex Deucher
Date: Wed Mar 7 19:05:01 2012 -0500
drm/radeon/kms: fix hdmi duallink checks
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Created attachment 58148
fix
This patch should fix it. Your chip is limited to 165 Mhz single link
tmds. The mode you are trying to set is >165 Mhz. With this patch
applied the mode should be properly rejected by the driver.
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I've tested against a kernel with this patch, as well as mainline kernel
(both built by ubuntu kernel team), and am still seeing the same
behavior. So seems like this change doesn't fix the issue.
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** Changed in: linux
Status: Unknown => Confirmed
** Changed in: linux
Importance: Unknown => Medium
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https://bugs.launchpad.net/bugs/915408
Title:
Gar
** Bug watch added: Linux Kernel Bug Tracker #42887
http://bugzilla.kernel.org/show_bug.cgi?id=42887
** Also affects: linux via
http://bugzilla.kernel.org/show_bug.cgi?id=42887
Importance: Unknown
Status: Unknown
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This issue appears to be an upstream bug, since you tested the latest
upstream kernel. Would it be possible for you to open an upstream bug
report at bugzilla.kernel.org [1]? That will allow the upstream
Developers to examine the issue, and may provide a quicker resolution to
the bug.
If you are
confirmed still seeing the problem with:
$ uname -a
Linux taplop 3.3.0-030300rc6-generic #201203032235 SMP Sun Mar 4 03:36:15 UTC
2012 x86_64 x86_64 x86_64 GNU/Linux
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Could you test one additional kernel? This is the latest upstream stable kernel:
http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.3-rc6-precise/
This will tell us if the fix is in the mainline kernel.
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If that is the case, it seems the refine_tmds_dual_link_checks.patch
patch does not resolve this bug.
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https://bugs.launchpad.net/bugs/915408
Title:
Garbled displ
ok, still seeing the problem with:
$ uname -a
Linux taplop 3.2.0-12-generic #21~lp915408 SMP Thu Feb 2 21:24:18 UTC 2012
x86_64 x86_64 x86_64 GNU/Linux
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https://bu
When you ran the test kernel from
http://people.canonical.com/~jsalisbury/lp915408/, did the uname -a
report only 3.2.0-12-generic as the kernel version? It should have had
the following test appended ~lp915408. If it didn't it may not have
been the correct test kernel.
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** Changed in: linux (Ubuntu)
Importance: Undecided => Medium
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https://bugs.launchpad.net/bugs/915408
Title:
Garbled display on external screen when using 1920
went back to the oneiric kernel after it didn't work, but uname at the
time was definitely showing 3.2.0-12-generic ; do you need me to
reinstall and verify more info from uname -a?
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** Tags added: corruption
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https://bugs.launchpad.net/bugs/915408
Title:
Garbled display on external screen when using 1920x1080 instead of
1920x1200
To manage
@Joe,
Can you run uname -a, just so I can confirm you received the correct
test kernel?
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Title:
Garbled display on externa
** Tags added: patch
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Title:
Garbled display on external screen when using 1920x1080 instead of
1920x1200
To manage noti
still seeing the same issue with the kernel package from
http://people.canonical.com/~jsalisbury/lp915408/
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Title:
Garbled
There is a test kernel available from the following:
http://people.canonical.com/~jsalisbury/lp915408/
Can you test the kernel and report back if the patch resolves the bug?
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Building a test kernel now. I'll post a link to the kernel shortly.
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Title:
Garbled display on external screen when using
** Changed in: linux (Ubuntu)
Status: New => Confirmed
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Title:
Garbled display on external screen when using 1920x10
Based on the upstream bug, it sounds like this is due to a bug in the
kernel so no change needed to X itself. However I'll leave the X task
open for a bit longer so we can track progress.
** Changed in: xserver-xorg-video-ati (Ubuntu)
Status: Triaged => In Progress
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Guessing this patch should fix it.
** Also affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Patch added: "refine_tmds_dual_link_checks.patch"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/915408/+attachment/2708796/+files/refine_tmds_dual_link_checks.patch
** Tag
Kernel team - mind rolling a test kernel deb for Joe to test?
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Title:
Garbled display on external screen when using 1920x10
A patch referencing this bug report has been merged in Linux v3.3-rc2:
commit 9aa59993e226af94088adaee993eb8cfd33ae295
Author: Alex Deucher
Date: Fri Jan 20 15:03:30 2012 -0500
drm/radeon/kms: refine TMDS dual link checks
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confirmed that the following sequence displays a non-garbled 1920x1080
display on the external monitor:
# xrandr --newmode "1920x1080R" 138.50 1920 1968 2000 2080 1080 1083 1088
+hsync -vsync
# xrandr --addmode HDMI-0 1920x1080R
# xrandr 1920x1080R
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Created attachment 7
possible fix
This patch against drm-next or Linus git should fix the issue.
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Title:
Garbled displ
The problem is the modeline from your monitor for the 1920x1080 mode is greater
than 165 Mhz which is the current cut off for single link mode in the driver:
(II) RADEON(0): Modeline "1920x1080"x60.0 172.78 1920 2040 2248 2576 1080
1081 1084 1118 -hsync +vsync (67.1 kHz)
It should work if you
Launchpad has imported 4 comments from the remote bug at
https://bugs.freedesktop.org/show_bug.cgi?id=44755.
If you reply to an imported comment from within Launchpad, your comment
will be sent to the remote bug automatically. Read more about
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Joe - I've forwarded your bug report upstream to
https://bugs.freedesktop.org//show_bug.cgi?id=44755 - please subscribe
yourself to the CC for that bug in case they need further information or
wish you to test something.
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** Bug watch added: freedesktop.org Bugzilla #44755
https://bugs.freedesktop.org/show_bug.cgi?id=44755
** Also affects: xserver-xorg-driver-ati via
https://bugs.freedesktop.org/show_bug.cgi?id=44755
Importance: Unknown
Status: Unknown
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** Package changed: xorg (Ubuntu) => xserver-xorg-video-ati (Ubuntu)
** Changed in: xserver-xorg-video-ati (Ubuntu)
Importance: Undecided => High
** Changed in: xserver-xorg-video-ati (Ubuntu)
Status: New => Triaged
** Description changed:
originally reported as bug 813566 :
i
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https://bugs.launchpad.net/bugs/915408
Title:
Garbled display on external screen when using 1920x1080 instead of
1920x1200
To manage notifications about this bug go to:
https://
Public bug reported:
originally reported as bug 813566 :
i have an external monitor (1920x1200 resolution) that, when set to
1920x1080 resolution (native resolution of laptop display), garbles the
screen as seen in the screenshot attached to bug 813566. The problem
doesn't happen using the catal
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