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Per this thread and its solution, I'm using compiz for enabling alt-tab window switch. It had been working as expected for a few days, but today suddenly it started to freeze the entire display. Since it stops responding with its keyboard & mouse, I have to login via ssh and reboot (I just wanted to be as nice as possible to the system). Any idea is appreciated.

Just describing my environment more precisely, I use this problematic Ubuntu (12.04, Gnome Classic) machine from Mac via synergy 1.3.6. And I particularly see this issue happen when I switch to filezilla (FTP client). With Gnome Classic (no effect) I've not seen this.

Zanna
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IsaacS
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    Have you looked on Launchpad to see if this bug has already been reported? If you search for "alt-tab freezes" on https://launchpad.net/ you will see a lot of bugs; I suggest you read through them to see if one exactly matches your problem. If none of them match, please take a look at http://askubuntu.com/questions/5121/how-do-i-report-a-bug – David Edwards May 24 '12 at 09:16
  • This question should instead be filed as a bug report, and as such is off-topic, thanks! Instructions on filing a bug report are here. – fossfreedom May 25 '12 at 08:19
  • @David Edwards I've searched through launchpad.net but haven't found the report that exactly the same with mine. Think I issue a report (not sure if the phenomenon I'm seeing is bug or spec though). – IsaacS May 28 '12 at 01:42
  • @fossfreedom Correct me if I'm wrong, but doesn't the link you cited tell that you should provide a link to the specific issue report when you close a question? I asked my question because I didn't know if it's bug nor already reported. If I already knew the phenomenon I asked was a bug, I hadn't asked here... – IsaacS May 28 '12 at 01:45
  • @IsaacS - remember, Ask Ubuntu is not a bug-tracker. Freezes in applications and desktops is not a usual occurrence and as such are not a good fit for Ask Ubuntu. This should be reported as a launchpad bug (instructions in the link) - the developers will decide if this is a duplicate of another bug. – fossfreedom May 28 '12 at 05:34
  • @fossfreedom ok I understand and will report on launchpad. Still I'm glad that I asked this here b/c experienced users like you told me it could be a bug :) – IsaacS May 28 '12 at 14:33

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