ubuntu-x-swat team mailing list archive

["Johannes H. Jensen" <joh@xxxxxxxxxxxxxxxxx>]

FWIW this seems to be related to the disk with the root filesystem.
Here's why:

I did some more tests:

1. Run 'stress -d 2' on another disk, then test with 'time ls /usr/bin'.
2. Run 'stress -d 2' on another disk, then test with 'time ls -R /media/other-disk/'.
3. Run 'stress -d 2' on root disk, then test with 'time ls -R /media/other-disk/'

The results were pretty clear:

1. Rendering problem: NO
2. Rendering problem: NO
3. Rendering problem: YES

So which directory is listed by the 'ls' command is irrelevant.

Hence the conclusion: heavy I/O on the root disk -> bug.

The root filesystem is ext3. On the laptop it's ext4.

I have also tried to disable swap, but the problem still occurs.

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https://bugs.launchpad.net/bugs/790337

Title:
  Heavy disk I/O causes X rendering to hang