Public bug reported: This machine was fast as lightning on 11.10, on the same hardware (Dell Precision M4400, 8GB RAM)
After upgrade, X now freezes completely (nothing is updated on the screen, including load monitors) for periods of 1-10 seconds. This typically occurs during I/O, here are the typical causes: - Opening a new blank tab in Chrome (version 18.0.1025.168) - Reloading an existing page in Chrome - Opening or saving a file in Eclipse (3.7.2 from apt-get, type of file doesn't matter) This does not occur when opening a file in a simple text editor, or launching most small applications, nor does it seem to affect Firefox. It is possible that this isn't related to I/O but instead to x input, process allocation, etc. I would even say it's a Chrome issue but Eclipse and Chrome both started doing this with 12.04, thus I'm guessing it's systemic. Tried running Chrome from a clean config (no plugins) - same effect. The system is not SWAPPING at all, there is plenty of ram, and top reports no wait. dmesg shows no obvious errors. CPU meters appear to spike during the pause (1 of the 2 cores), but I can't be 100% sure because the screen doesn't update until after. When I run Windows 7 in VirtualBox, the guest itself runs with no delays. I've installed preload, which made little difference. Attached is the output of hdparm -I, hdparm -tT, smartctl -a, lspci -vvn, vmstat -2 The vmstat output covers several of these major pauses, especially towards the end (the last 12-15 rows were all printed only after it unfroze). This bug is similar to https://bugs.launchpad.net/ubuntu/+source/linux-source-2.6.22/+bug/131094 and https://bugs.launchpad.net/ubuntu/+source/linux-source-2.6.22/+bug/131094 but I don't think they are the same. Let me know if I can supply anything else. ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: xorg 1:7.6+12ubuntu1 ProcVersionSignature: Ubuntu 3.2.0-24.37-generic 3.2.14 Uname: Linux 3.2.0-24-generic x86_64 ApportVersion: 2.0.1-0ubuntu7 Architecture: amd64 Date: Thu May 10 10:15:43 2012 InstallationMedia: Xubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012) ProcEnviron: LANGUAGE=en_US:en PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: xorg UpgradeStatus: Upgraded to precise on 2012-04-30 (9 days ago) ** Affects: ubuntu Importance: Undecided Status: New ** Tags: amd64 apport-bug precise -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/997676 Title: After upgrade to 12.04, X briefly freezes during I/O activity To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/997676/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
