Hi, I'm using Firefox and suffered from often occasional lockups of system due to overload of both CPU cores by 2 unity-panel-service processes and hud-service. Especially often this behavior vere triggered when I tried to type a text on any forum (and that as extremely annoying). That happened pretty much often like every hour and sometimes a few times in a row.
I think I found the reason why it happened to me and finally "fixed" it. Apperently I had ~30 RSS feeds in the bookmars menu + Feed Sidebar addon which caused them to reload every hour (not all at once but all during each hour). So, as result structure of the menu were changed every now and then. And these changes sometimes caused Unity Panel and HUD to overload system! So, to "fix" this issue I had moved all my RSS feeds and dynamic bookmars into Unsorted Bookmarks section which does not shows up on the menu (it's actually there but only as a link to open a bookmarks manager). Seems like occasional freezes disappeared from that moment. It's understandable that dynamic changes in the menu could require some resources but I'm pretty much sure that hoggin 100% of 64 bit dual-core CPU during 10-30 seconds is pretty much odd thing to do. At least I don't need these RSS feeds in the bookmarks menu but what will have to do those with RSS feeds on the bookmarks toolbar? Moving such feeds into Unsorted Bookmarks will totally break their workflow. -- You received this bug notification because you are a member of DX Packages, which is subscribed to unity in Ubuntu. Matching subscriptions: dx-packages https://bugs.launchpad.net/bugs/968533 Title: Alt-tab to Firefox sends Firefox to 100% CPU; unity-panel-service to 80% CPU and hud-service to 20-80% CPU Status in Unity: Confirmed Status in “unity” package in Ubuntu: Confirmed Bug description: I've been seeing UI hangs after switching tabs in Firefox, and switching from other applications to Firefox. It can take 3-8 seconds to change *tab*. During this time the CPU is maxed out; typical output from 'top' during this period shows 'hud- service' and 'unity-panel-service' combined using about the same CPU as Firefox itself: 100 10.4 26:07.73 firefox 53 0.6 6:14.86 hud-service 38 1.5 6:42.14 unity-panel-service I suspect that the change is causing a (an inefficient) re-index related to updated menu structures. (Eg. something like the history menu, although I can't see what it is as don't currently have a menu bar). To manage notifications about this bug go to: https://bugs.launchpad.net/unity/+bug/968533/+subscriptions -- Mailing list: https://launchpad.net/~dx-packages Post to : dx-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~dx-packages More help : https://help.launchpad.net/ListHelp