** No longer affects: linux (Ubuntu Quantal)
** No longer affects: linux (Ubuntu Precise)
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Title:
System Stutter When HDMI/Displayport Monitor Is
It's fine to mark this as invalid, since it cannot be reproduced as of
Raring.
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Title:
System Stutter When HDMI/Displayport Monitor Is Connected
tdeering, would you need a backport to a release prior to Raring, or may
this be marked Status Invalid?
Declining the linux (Ubuntu) task as this is not reproducible in Raring
for the original reporter as per
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/964231/comments/22
.
** Tags added:
k, that one failed ^^
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Title:
System Stutter When HDMI/Displayport Monitor Is Connected
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Thanks! Next one up at
http://kernel.ubuntu.com/~sarvatt/lp964231/bisect10/
git bisect start 'drivers/gpu/drm'
# good: [28a33cbc24e4256c143dce96c7d93bf423229f92] Linux 3.5
git bisect good 28a33cbc24e4256c143dce96c7d93bf423229f92
# bad: [19f949f52599ba7c3f67a5897ac6be14bfcb1200] Linux 3.8
git bisec
Sorry for the delay on this. That kernel worked perfectly!
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Title:
System Stutter When HDMI/Displayport Monitor Is Connected
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** Tags removed: blocks-hwcert blocks-hwcert-enablement
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Title:
System Stutter When HDMI/Displayport Monitor Is Connected
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3 more steps.
http://kernel.ubuntu.com/~sarvatt/lp964231/bisect9/
git bisect start 'drivers/gpu/drm'
# good: [28a33cbc24e4256c143dce96c7d93bf423229f92] Linux 3.5
git bisect good 28a33cbc24e4256c143dce96c7d93bf423229f92
# bad: [19f949f52599ba7c3f67a5897ac6be14bfcb1200] Linux 3.8
git bisect bad 19f
Hmm, the bug is present in the above kernel.
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Title:
System Stutter When HDMI/Displayport Monitor Is Connected
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4 steps to go
http://kernel.ubuntu.com/~sarvatt/lp964231/bisect8/
git bisect start 'drivers/gpu/drm'
# good: [28a33cbc24e4256c143dce96c7d93bf423229f92] Linux 3.5
git bisect good 28a33cbc24e4256c143dce96c7d93bf423229f92
# bad: [19f949f52599ba7c3f67a5897ac6be14bfcb1200] Linux 3.8
git bisect bad 19f
awesome, still looks okay with your rc4
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Title:
System Stutter When HDMI/Displayport Monitor Is Connected
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Nice, that cut 2 more steps out of the bisect and we're down to 5 max
left.
http://kernel.ubuntu.com/~sarvatt/lp964231/bisect7/
git bisect start 'drivers/gpu/drm'
# good: [28a33cbc24e4256c143dce96c7d93bf423229f92] Linux 3.5
git bisect good 28a33cbc24e4256c143dce96c7d93bf423229f92
# bad: [19f949f5
Cool ! So, that one seems to resume from suspend okay, AND the external
display works properly.
Progress!!
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Title:
System Stutter When HDMI/Displ
The performance degradation is seen and worsened after the machine has
resumed from suspend. It's often you won't see the issue reported UNLESS
you've resumed from suspend.
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Ok marked that one as skip too, just out of curiousity, is resuming
properly from suspend a symptom or something? We're only testing the
stuttering with this. Next kernel
http://kernel.ubuntu.com/~sarvatt/lp964231/bisect6/
git bisect start 'drivers/gpu/drm'
# good: [28a33cbc24e4256c143dce96c7d93
This doesn't resume properly from suspend either.
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Title:
System Stutter When HDMI/Displayport Monitor Is Connected
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Thanks, skipped that kernel in the bisect then, next step:
http://kernel.ubuntu.com/~sarvatt/lp964231/bisect5/
git bisect start 'drivers/gpu/drm'
# good: [28a33cbc24e4256c143dce96c7d93bf423229f92] Linux 3.5
git bisect good 28a33cbc24e4256c143dce96c7d93bf423229f92
# bad: [19f949f52599ba7c3f67a5897
I am unable to verify if the kernel posted above fixes the display
issue. The system cannot resume from suspend properly, it halts, no
mouse/keyboard functionality and cannot switch tty. Plugging in external
display does nothing. System is completely unresponsive.
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New one up at http://kernel.ubuntu.com/~sarvatt/lp964231/bisect4/
git bisect start 'drivers/gpu/drm'
# good: [28a33cbc24e4256c143dce96c7d93bf423229f92] Linux 3.5
git bisect good 28a33cbc24e4256c143dce96c7d93bf423229f92
# bad: [19f949f52599ba7c3f67a5897ac6be14bfcb1200] Linux 3.8
git bisect bad 19f9
a side note that the above kernel causes the system to not boot properly
sometimes. In that the system halts before the unity desktop is
displayed, cannot switch tty, no mouse of keyboard control.
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This one looks good. No stuttering, and the external display works
fine!!
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Title:
System Stutter When HDMI/Displayport Monitor Is Connected
To ma
Thanks, we're only testing the stuttering here, other problems are going
to pop up so just ignore them until we hit the final step :) Also there
is no need to test multiple systems or anything, any of those that fail
+ the Acer S231HL would be fine. Next kernel
http://kernel.ubuntu.com/~sarvatt/l
** Changed in: linux (Ubuntu)
Status: Confirmed => In Progress
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Title:
System Stutter When HDMI/Displayport Monitor Is Connected
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Updated csv attached.
** Attachment added: "HDMI Stutter Bug #964231 - Sheet1(1).csv"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/964231/+attachment/3695763/+files/HDMI%20Stutter%20Bug%20%23964231%20-%20Sheet1%281%29.csv
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^^ No stuttering effect, but desktop is never shown on external monitor.
I can tell a signal is being sent via the light indicator on the Acer
monitor, but no image just a black screen.
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h
Okay, so I have a bit more information. Most importantly this isn't
limited to Lenovo hardware. Please see the following attachment for a
matrix of kernel, laptops, and monitors tested.
** Attachment added: "HDMI Stutter Bug #964231 - Sheet1.csv"
https://bugs.launchpad.net/ubuntu/+source/linux
Thanks for that, I can see on there that it worked so I prepared the
next step (again the good and bad markings are reversed since we're
bisecting backwards to find the fix not the regression)
http://kernel.ubuntu.com/~sarvatt/lp964231/bisect2/
# good: [28a33cbc24e4256c143dce96c7d93bf423229f92]
Ok, I've started a reverse bisect on this to find where it was fixed
(hence why the good and bad results below are inverted) and it will take
approximately 10 steps. Can you try this kernel first and see if it
works properly?
http://kernel.ubuntu.com/~sarvatt/lp964231/bisect1/
git bisect start '
Hi Jeff,
Because we have a new kernel that works, we would have to bisect to
figure out which commit fixes the issue. I'll chat more with Robert and
figure out a way forward.
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Tried updating BIOS version to G3ET93WW, and this actually disables the
display port for L530 systems.
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Title:
System Stutter When HDMI/Displaypor
** Summary changed:
- System Stutter When HDMI Monitor Is Connected
+ System Stutter When HDMI/Displayport Monitor Is Connected
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Title:
System St
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