[karmic kubuntu] high cpu usage after suspend to ram

Forgot to mention I use intel GM965 chipset.

It seems that firefox-3.5 might not be the culprit. Same problem with opera also.

My guess is that after sleep something is going wrong with xserver and networking applications.

top - 16:21:23 up 8:08, 2 users, load average: 0.62, 0.45, 0.43
Tasks: 202 total, 3 running, 198 sleeping, 0 stopped, 1 zombie
Cpu(s): 49.0%us, 21.5%sy, 0.0%ni, 28.9%id, 0.0%wa, 0.5%hi, 0.2%si, 0.0%st
Mem: 1987884k total, 1907076k used, 80808k free, 44388k buffers
Swap: 2104444k total, 119684k used, 1984760k free, 921924k cached

  PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
31203 jithine 20 0 203m 94m 17m S 46 4.9 0:20.96 opera
 3579 root 20 0 291m 113m 14m R 40 5.8 40:38.13 Xorg

I am not facing this problem anymore. Guess some updates in between fixed this.

Hi jithin1987,

Please attach the output of `lspci -vvnn`, and attach your /var/log/Xorg.0.log (and maybe Xorg.0.log.old) file from after reproducing this issue. If you've made any customizations to your /etc/X11/xorg.conf please attach that as well.

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I am not at all facing this issue now. Guess it can be safely closed. Don't know why it occurred at that time.

Well today I faced the same issue again, after a long time. (second time guess). System was painful to use.
 In my xorg.conf only additional entry I have is

Section "ServerFlags"
        Option "DontZap" "False"
EndSection

I can confirm, but only xorg uses high CPU. It makes it impossible to use the computer, as gnome-screensaver never prompts me to enter my password. All I see is a blank/black screen (which is my screensaver) along with a mouse that will move sporadically if I move it. If I press ctrl+alt+f1 and wait about a minute, I eventually get access, run top, and see that xorg is using 100% cpu. Nothing else looks abnormal.

I've attached the output of lspci -vvnn

I'm on a lenovo thinkpad w500, on Karmic x64 (beta), but it also happened in Jaunty.

I should add this only happens about 50% of the time, but I can't seem to pin it on anything specific. Whether the system wants to resume or not appears to be random.

Confirm this bug as well. I'm running Karmic with the ATI Proprietary drivers. Xorg CPU usage hovers from 25-75% This is a fresh install of Karmic, not an upgrade from Jaunty. While the computer remains usable, I am experiencing laggy screen draws, including lags when typing in shell windows (through X) between when I type and when the keystroke shows on-screen. CPU usage seems to build over time too. After a fresh login, levels are normal and the system is responsive. Over the course of time, however, usage increases and responsiveness decreases. I'll check to see if it's related to Firefox being open, but FF's CPU usage is "normal"

Hi Jithin,

        Thank you for taking the time to report this bug and helping to make Ubuntu better. You reported this bug a while ago and there hasn't been any activity in it recently. We were wondering is this still an issue for you? Can you try with the latest development release of Ubuntu? (ISO CD images are available from http://cdimage.ubuntu.com/releases/)

        If it remains an issue, could you also attach a new /var/log/Xorg.0.log?
        Thanks in advance.

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We're closing this bug since it is has been some time with no response from the original reporter. However, if the issue still exists please feel free to reopen with the requested information. Also, if you could, please test against the latest development version of Ubuntu, since this confirms the bug is one we may be able to pass upstream for help.

Hello
I installed ubuntu 11.04 64b desktop on a laptop Dell precision M4600 and I experience the same problem
after resume from suspend, I observe some process using high cpu load
when I close these process, the high load is reported on an other process.

I can confirm that xorg is causing high CPU usage after resuming from suspend. I have Linuxmint 12 KDE. I resumed my computer and the CPU usage stayed steady at 25%. I opened system monitor and Xorg was the only process consuming that bandwidth. I have not modified any of my Xorg settings.

Please let me know what information I could provide next time this happens to me.

Status changed to 'Confirmed' because the bug affects multiple users.

Jithin Emmanuel, this bug was reported a while ago and there hasn't been any activity in it recently. We were wondering if this is still an issue? If so, could you please confirm this issue exists with the latest development release of Ubuntu? ISO images are available from http://cdimage.ubuntu.com/daily-live/current/ . If the issue remains, could you please run the following command from a Terminal (Applications->Accessories->Terminal), as it will automatically gather and attach updated debug information to this report:

apport-collect -p linux REPLACE-WITH-BUG-NUMBER

If reproducible, could you please provide the information following https://wiki.ubuntu.com/DebuggingKernelSuspend ?

If reproducible, could you also please test the latest upstream kernel available (not the daily folder) following https://wiki.ubuntu.com/KernelMainlineBuilds ? It will allow additional upstream developers to examine the issue. Once you've tested the upstream kernel, please comment on which kernel version specifically you tested. If this bug is fixed in the mainline kernel, please add the following tags:
kernel-fixed-upstream
kernel-fixed-upstream-VERSION-NUMBER

where VERSION-NUMBER is the version number of the kernel you tested. For example:
kernel-fixed-upstream-v3.3.13-rc7

This can be done by clicking on the yellow circle with a black pencil icon next to the word Tags located at the bottom of the bug description. As well, please remove the tag:
needs-upstream-testing

If the mainline kernel does not fix this bug, please add the following tags:
kernel-bug-exists-upstream
kernel-bug-exists-upstream-VERSION-NUMBER

As well, please remove the tag:
needs-upstream-testing

Once testing of the upstream kernel is complete, please mark this bug's Status as Confirmed. Please let us know your results. Thank you for your understanding.

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]