| 2009-04-20 23:07:15 |
Richard Guo |
bug |
|
|
added bug |
| 2009-04-20 23:07:15 |
Richard Guo |
attachment added |
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lspci http://launchpadlibrarian.net/25802386/lspci |
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| 2009-04-20 23:07:42 |
Richard Guo |
attachment added |
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powertop - AC http://launchpadlibrarian.net/25802392/powertop%20-%20AC |
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| 2009-04-20 23:08:20 |
Richard Guo |
attachment added |
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powertop - battery http://launchpadlibrarian.net/25802398/powertop%20-%20battery |
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| 2009-04-20 23:08:44 |
Richard Guo |
attachment added |
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xorg.conf http://launchpadlibrarian.net/25802401/xorg.conf |
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| 2009-04-20 23:09:08 |
Richard Guo |
attachment added |
|
top http://launchpadlibrarian.net/25802402/top |
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| 2009-04-20 23:23:50 |
Richard Guo |
description |
Binary package hint: xserver-xorg-video-intel
This issue is a regression from Hardy. I did a clean install of Kubuntu Jaunty RC, using ext4 for partitions. Then I disabled composite effects via xorg.conf and KDE4 settings. The first thing I noticed was that the laptop (Lenovo T61 with Intel GM965 card) was *noticeably* warmer than before, to the point where I can't use it on my lap anymore.
I did some measurements using powertop and top to find the guilty process.
Top showed the process Xorg taking up 20% of CPU just to redraw the top output. Nothing was open except the konsole window where the testing was done. This is in comparison with 1-2% CPU usage on idle for Hardy.
Powertop showed fewer causes for wakeup than before (~100 vs ~180 with KDE3 on Hardy), but the CPU spent more time in higher P-states (14% vs 1%). This is consistent with the Xorg process usage that top showed. Absolute power consumption under battery operation. In hardy (sorry, I don't have the output of powertop on hardy), the power use was 12 W with wireless on, idle, and the dimmest screen brightness. In Jaunty, I'm seeing consumption in excess of 15W under the same conditions.
The line "58.5% ( 98.2) <interrupt> : i915@pci:0000:00:02.0" made me think that something was wrong with the latest Intel video drivers.
I have also attached my xorg.conf file, which has very little deviance from defaults (most notably EXA acceleration). The output of lspci -vv is also included.
In short, I suspect that this problem is due to Intel 2D causing Xorg to do a lot of redraws. Text in particular seems to be slow to process (slow konqueror scrolling).
With some research, I also found that framebuffer compression is disabled in the 2.6.3 driver due to a bug. That may have caused an additional spike in power draw. |
Binary package hint: xserver-xorg-video-intel
This issue is a regression from Hardy. I did a clean install of Kubuntu Jaunty RC, using ext4 for partitions. Then I disabled composite effects via xorg.conf and KDE4 settings. The first thing I noticed was that the laptop (Lenovo T61 with Intel GM965 card) was *noticeably* warmer than before, to the point where I can't use it on my lap anymore.
I did some measurements using powertop and top to find the guilty process.
Top showed the process Xorg taking up 20% of CPU just to redraw the top output. Nothing was open except the konsole window where the testing was done. This is in comparison with 1-2% CPU usage on idle for Hardy.
Powertop showed fewer causes for wakeup than before (~100 vs ~180 with KDE3 on Hardy), but the CPU spent more time in higher P-states (14% vs 1%). This is consistent with the Xorg process usage that top showed. Absolute power consumption under battery operation. In hardy (sorry, I don't have the output of powertop on hardy), the power use was 12 W with wireless on, idle, and the dimmest screen brightness. In Jaunty, I'm seeing consumption in excess of 15W under the same conditions.
The line "58.5% ( 98.2) <interrupt> : i915@pci:0000:00:02.0" made me think that something was wrong with the latest Intel video drivers.
I have also attached my xorg.conf file, which has very little deviance from defaults (most notably EXA acceleration). The output of lspci -vv is also included.
In short, I suspect that this problem is due to Intel 2D causing Xorg to do a lot of redraws. Text in particular seems to be slow to process (slow konqueror scrolling).
With some research, I also found that framebuffer compression is disabled in the 2.6.3 driver due to a bug. That may have caused an additional spike in power draw.
At the time of posting, all packages were the latest in the repositories. The kernel version is 2.6.28-11-generic. |
|
| 2009-04-21 22:14:26 |
Bryce Harrington |
description |
Binary package hint: xserver-xorg-video-intel
This issue is a regression from Hardy. I did a clean install of Kubuntu Jaunty RC, using ext4 for partitions. Then I disabled composite effects via xorg.conf and KDE4 settings. The first thing I noticed was that the laptop (Lenovo T61 with Intel GM965 card) was *noticeably* warmer than before, to the point where I can't use it on my lap anymore.
I did some measurements using powertop and top to find the guilty process.
Top showed the process Xorg taking up 20% of CPU just to redraw the top output. Nothing was open except the konsole window where the testing was done. This is in comparison with 1-2% CPU usage on idle for Hardy.
Powertop showed fewer causes for wakeup than before (~100 vs ~180 with KDE3 on Hardy), but the CPU spent more time in higher P-states (14% vs 1%). This is consistent with the Xorg process usage that top showed. Absolute power consumption under battery operation. In hardy (sorry, I don't have the output of powertop on hardy), the power use was 12 W with wireless on, idle, and the dimmest screen brightness. In Jaunty, I'm seeing consumption in excess of 15W under the same conditions.
The line "58.5% ( 98.2) <interrupt> : i915@pci:0000:00:02.0" made me think that something was wrong with the latest Intel video drivers.
I have also attached my xorg.conf file, which has very little deviance from defaults (most notably EXA acceleration). The output of lspci -vv is also included.
In short, I suspect that this problem is due to Intel 2D causing Xorg to do a lot of redraws. Text in particular seems to be slow to process (slow konqueror scrolling).
With some research, I also found that framebuffer compression is disabled in the 2.6.3 driver due to a bug. That may have caused an additional spike in power draw.
At the time of posting, all packages were the latest in the repositories. The kernel version is 2.6.28-11-generic. |
Binary package hint: xserver-xorg-video-intel
This issue is a regression from Hardy. I did a clean install of Kubuntu Jaunty RC, using ext4 for partitions. Then I disabled composite effects via xorg.conf and KDE4 settings. The first thing I noticed was that the laptop (Lenovo T61 with Intel GM965 card) was *noticeably* warmer than before, to the point where I can't use it on my lap anymore.
I did some measurements using powertop and top to find the guilty process.
Top showed the process Xorg taking up 20% of CPU just to redraw the top output. Nothing was open except the konsole window where the testing was done. This is in comparison with 1-2% CPU usage on idle for Hardy.
Powertop showed fewer causes for wakeup than before (~100 vs ~180 with KDE3 on Hardy), but the CPU spent more time in higher P-states (14% vs 1%). This is consistent with the Xorg process usage that top showed. Absolute power consumption under battery operation. In hardy (sorry, I don't have the output of powertop on hardy), the power use was 12 W with wireless on, idle, and the dimmest screen brightness. In Jaunty, I'm seeing consumption in excess of 15W under the same conditions.
The line "58.5% ( 98.2) <interrupt> : i915@pci:0000:00:02.0" made me think that something was wrong with the latest Intel video drivers.
I have also attached my xorg.conf file, which has very little deviance from defaults (most notably EXA acceleration). The output of lspci -vv is also included.
In short, I suspect that this problem is due to Intel 2D causing Xorg to do a lot of redraws. Text in particular seems to be slow to process (slow konqueror scrolling).
With some research, I also found that framebuffer compression is disabled in the 2.6.3 driver due to a bug. That may have caused an additional spike in power draw.
At the time of posting, all packages were the latest in the repositories. The kernel version is 2.6.28-11-generic.
[lspci]
00:00.0 Host bridge: Intel Corporation Mobile PM965/GM965/GL960 Memory Controller Hub (rev 0c)
Subsystem: Lenovo Device 20b3
00:02.0 VGA compatible controller: Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller (rev 0c)
Subsystem: Lenovo Device 20b5
|
|
| 2009-04-23 08:44:34 |
Richard Guo |
attachment added |
|
powertop - intel 2.4 http://launchpadlibrarian.net/25873520/powertop%20-%20intel%202.4 |
|
| 2009-04-23 12:43:47 |
valereo |
attachment added |
|
lspci http://launchpadlibrarian.net/25885252/lspci |
|
| 2009-04-23 12:44:23 |
valereo |
attachment added |
|
top http://launchpadlibrarian.net/25885263/top |
|
| 2009-04-24 00:13:52 |
Bryce Harrington |
summary |
xserver 1.6.0 - High %CPU/Power Usage with Intel GM965 |
[i965] xserver 1.6.0 - High %CPU/Power Usage with Intel GM965 |
|
| 2009-04-24 02:57:04 |
valereo |
attachment added |
|
powertop on battery http://launchpadlibrarian.net/25909518/powertop%20%28on%20battery%29 |
|
| 2009-05-02 23:49:29 |
Bryce Harrington |
summary |
[i965] xserver 1.6.0 - High %CPU/Power Usage with Intel GM965 |
[i965] High %CPU/Power Usage unless downgrade to 2.4 (UXA/EXA) |
|
| 2009-05-03 00:06:34 |
Bryce Harrington |
xserver-xorg-video-intel (Ubuntu): status |
New |
Incomplete |
|
| 2009-05-06 18:47:52 |
Bryce Harrington |
tags |
|
high-cpu |
|
| 2009-05-12 21:00:46 |
Bryce Harrington |
summary |
[i965] High %CPU/Power Usage unless downgrade to 2.4 (UXA/EXA) |
[i965] Kubuntu: High %CPU/Power Usage unless downgrade to 2.4 (UXA/EXA) |
|
| 2009-05-12 22:16:52 |
Bryce Harrington |
xserver-xorg-video-intel (Ubuntu): importance |
Undecided |
Low |
|
| 2009-05-12 22:16:52 |
Bryce Harrington |
xserver-xorg-video-intel (Ubuntu): status |
Incomplete |
Confirmed |
|
| 2009-06-26 03:34:23 |
Bryce Harrington |
xserver-xorg-video-intel (Ubuntu): status |
Confirmed |
New |
|
| 2009-06-26 03:34:26 |
Bryce Harrington |
xserver-xorg-video-intel (Ubuntu): status |
New |
Incomplete |
|
| 2009-07-27 17:24:59 |
Bryce Harrington |
xserver-xorg-video-intel (Ubuntu): status |
Incomplete |
Invalid |
|
