Kubuntu: desktop/video jerking every few seconds.

Bug #291243 reported by Terry
4
Affects Status Importance Assigned to Milestone
Ubuntu
Incomplete
Undecided
Unassigned

Bug Description

Not sure how to summarise this bug except that it is more noticeable whilst playing a video. Since upgrading to Intrepid I've noticed slight pauses/jerks every ~10 seconds or so.
In the meantime, I'll try and locate the source of the problem and hopefully expand on this issue.

$ lsb_release -rd
Description: Ubuntu 8.10
Release: 8.10

Revision history for this message
Jonas Pedersen (jonasped) wrote :

Thanks for the report. It would be helpful if you could provide some more information.
- Which GFX driver do you use?
- Which video player do you use?
- Is it all videos that suffer from this?
- If it is not all videos that suffer from this, please provide a link to the failing video if possible.
- General hardware specification of your machine.

Thanks.

Revision history for this message
Terry (terry-kryogenic) wrote :

Sorry, I should have included this information. I have a terrible cold atm.
I am using the Intel driver and primarily use Kaffeine but I have noticed this issue with the Dragon player as well. I do not think this is specific to video playback as whilst slowly moving a window I get a pause/jerk, it's just more noticeable while playing videos.

I've tried with desktop effects disabled and I've tried disabling the video kernel module as this was a little problematic in hardy but the problem is still present.

The hardware is a laptop with 2G of ram with an Intel Core 2 Duo T5300 (@1.73GHz)

I have attached the output of lspci -vv to give more detailed info on my hardware.

Revision history for this message
Terry (terry-kryogenic) wrote :

With nothing running apart from the kde4 desktop, using top -d.5 -p <Xorg pid> I noticed that CPU usage spikes from ~2% to ~16% every ~10 seconds. These spikes coincides exactly with the pauses with the desktop and video playback.

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