** Package changed: xserver-xorg-video-intel (Ubuntu) => linux (Ubuntu)
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https://bugs.launchpad.net/bugs/964231
Title:
System Stutter When HDMI Monitor
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: linux (Ubuntu Quantal)
Status: New => Confirmed
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Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: linux (Ubuntu Precise)
Status: New => Confirmed
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@Robert, hi robert, do you have any update ?
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Title:
System Stutter When HDMI Monitor Is Connected
Status in “xs
** Changed in: xserver-xorg-video-intel (Ubuntu)
Importance: High => Critical
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Title:
System Stutter When HDMI
** Changed in: xserver-xorg-video-intel (Ubuntu)
Importance: Undecided => High
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Title:
System Stutter When HDM
** Tags added: 201205-10647
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Title:
System Stutter When HDMI Monitor Is Connected
Status in “xserver-xorg-video-
** Tags added: 201202-10645
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Title:
System Stutter When HDMI Monitor Is Connected
Status in “xserver-xorg-video-
** Tags added: 201208-11524
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Title:
System Stutter When HDMI Monitor Is Connected
Status in “xserver-xorg-video-
** Tags added: 201202-10573
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Title:
System Stutter When HDMI Monitor Is Connected
Status in “xserver-xorg-video-
** Tags added: 201202-10574
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Title:
System Stutter When HDMI Monitor Is Connected
Status in “xserver-xorg-video-
@Robert, Hi Robert, could you please take a look at this bug ? thanks
** Changed in: xserver-xorg-video-intel (Ubuntu)
Assignee: Timo Aaltonen (tjaalton) => Robert Hooker (sarvatt)
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** Changed in: xserver-xorg-video-intel (Ubuntu)
Assignee: Canonical Hardware Enablement Team (canonical-hwe-team) => Timo
Aaltonen (tjaalton)
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https
** Tags added: 201205-11128
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Title:
System Stutter When HDMI Monitor Is Connected
Status in “xserver-xorg-video-
** Tags added: 201201-10388
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Title:
System Stutter When HDMI Monitor Is Connected
Status in “xserver-xorg-video-
** Also affects: xserver-xorg-video-intel (Ubuntu Precise)
Importance: Undecided
Status: New
** Also affects: xserver-xorg-video-intel (Ubuntu Quantal)
Importance: Undecided
Status: New
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** Attachment added: "HDMI xrandr --prop output"
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/964231/+attachment/3564105/+files/HDMI%20xrandr%20prop.txt
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Here's even more information. The output of 'xrandr --prop' with VGA and
with HDMI connected
** Attachment added: "VGa xrandr --prop output"
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/964231/+attachment/3564104/+files/VGA%20xrandr%20prop.txt
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I've attached the manuals for the two displays. The relevant pages seem
to be:
Samsung Manual: p44 (labeled 42), discusses HDMI in CEA mode for 1080p
Acer Manual: p12, standard timing table
My best guess for what is happening is that Ubuntu's display output
timing over HDMI is slightly out of syn
Here's something: The stutter occurs when using HDMI with my primary
monitor, but not with my HDTV.
Monitor: Acer S231HLbid
http://www.newegg.com/Product/Product.aspx?Item=N82E16824009255
TV: Samsung LN37A550
http://www.amazon.com/Samsung-LN37A550-37-Inch-1080p-HDTV/dp/B00141AZR2
The root cause
I think drm.debug=6 would help most, if there is a gfx related event it
should show up there.
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Title:
System Stut
I mean for example 'echo 6 > /sys/modules/drm/parameters/debug ; sleep
10; dmesg'
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Title:
System Stutter When HD
This occurs when going through display port as well.
** Tags added: 201202-10579
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Title:
System Stutter When HDM
** Tags added: 201206-11154
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Title:
System Stutter When HDMI Monitor Is Connected
Status in “xserver-xorg-video-
** Tags added: 201206-11272 201208-11522
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Title:
System Stutter When HDMI Monitor Is Connected
Status in “xserve
FYI, Ubuntu 12.10 has the same issue with my monitor + HDMI. The freezes
seem to be about 100ms in duration, and occur regularly every 1s. It's
incredibly irritating.
Output of vmstat:
procs ---memory-- ---swap-- -io -system-- cpu
r b swpd free buff cache
This one is confusing. There is a known (and fixed) stall with a
periodicity of about 10s. But a stall every 1s, indicates something
peculiar to your hardware, possibly something like an interrupt storm.
Does anything show up in perf top or vmstat or etc...?
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** Tags added: 201204-10922 lexington-lab
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Title:
System Stutter When HDMI Monitor Is Connected
Status in “xserv
** Tags added: blocks-hwcert-enablement
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Title:
System Stutter When HDMI Monitor Is Connected
Status in “xserver
** Changed in: xserver-xorg-video-intel (Ubuntu)
Assignee: (unassigned) => Canonical Hardware Enablement Team
(canonical-hwe-team)
** Tags added: blocks-hwcert precise
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Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: xserver-xorg-video-intel (Ubuntu)
Status: New => Confirmed
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