compiz.real hangs when using ediff

Upon further investigation, it is the window decorator that is causing the hang. If that module is disabled, compiz does not hang due to ediff.

I do not think it has anything to do with ediff, since I do not use that or emacs.

I have the problem as well, compiz.real going to 103% processor usage (apparently more than 100 is possible on a dual core). If I ssh into my laptop then, I can kill all compiz processes, I even have an alias for it:

alias killcompiz="ps auxf | grep compiz | grep -v grep | awk '{print \$2}' | xargs kill -9"

And then restart compiz:

/usr/bin/compiz &

And then everything is normal again. Next test: Trying Ctrl-Alt-F1, typing my username and password blind, and then typing killcompiz blind, see if I can regain control of my laptop without having to use another computer.

System specs: Acer Aspire 5920, Geforce 8600 GS 512 MB, nvidia proprietary driver, Ubuntu 8.04, upgraded from a 7.10 install.

Yeah, I didn't think it was something specific to ediff, but ediff is something that reliably triggers it for me.

If you have another way of reliably making it happen, tell us what it is. Also then try disabling your window decorator module in the advanced desktop effects settings, and try to get it to freeze again. If it's the same bug, it won't freeze with that module disabled.

Thanks for taking the time to report this bug and helping to make Ubuntu better. Could you please add your ~/.xsession-errors, /var/log/Xorg.0.log and the output of lspci -vvnn to your bug report as separate attachments? Thanks in advance.

We are closing this bug report because it lacks the information we need to investigate the problem, as described in the previous comments. Please reopen it if you can give us the missing information, and don't hesitate to submit bug reports in the future. To reopen the bug report you can click on the current status, under the Status column, and change the Status back to "New". Thanks again!.