This bug is missing log files that will aid in diagnosing the problem. >From a terminal window please run:
apport-collect 1352567 and then change the status of the bug to 'Confirmed'. If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'. This change has been made by an automated script, maintained by the Ubuntu Kernel Team. ** Changed in: linux (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1352567 Title: OOPS in cpufreq driver with AMD Kaveri CPU Status in “linux” package in Ubuntu: Confirmed Bug description: Occasionally I get my machine hung completely. Fortunately, I've got and saved oops listing using netconsole before hang, and here it is [1]. Here is little piece of oops from the link above: === [15051.270461] BUG: unable to handle kernel paging request at 00000000ff5ae8e4 [15051.271583] IP: [<ffffffff8109ae6e>] srcu_notifier_call_chain+0xe/0x20 … [15051.956205] Call Trace: [15051.980641] [<ffffffff81606085>] ? __cpufreq_notify_transition+0x95/0x1e0 [15052.005640] [<ffffffff816081ee>] cpufreq_notify_transition+0x3e/0x70 [15052.030240] [<ffffffff816083d8>] cpufreq_freq_transition_begin+0xe8/0x130 [15052.054522] [<ffffffff813b8940>] ? ucs2_strncmp+0x70/0x70 [15052.078208] [<ffffffff816089bf>] __target_index+0xbf/0x1a0 [15052.101348] [<ffffffff81608b9c>] __cpufreq_driver_target+0xfc/0x160 [15052.124250] [<ffffffff8160b0d4>] od_check_cpu+0xa4/0xb0 [15052.146789] [<ffffffff8160c9ec>] dbs_check_cpu+0x16c/0x1c0 [15052.168935] [<ffffffff8160b4dd>] od_dbs_timer+0x11d/0x180 [15052.190607] [<ffffffff8108e6ff>] process_one_work+0x17f/0x4c0 [15052.211825] [<ffffffff8108f46b>] worker_thread+0x11b/0x3f0 [15052.232490] [<ffffffff8108f350>] ? create_and_start_worker+0x80/0x80 [15052.253127] [<ffffffff81096479>] kthread+0xc9/0xe0 [15052.273292] [<ffffffff810963b0>] ? flush_kthread_worker+0xb0/0xb0 [15052.293487] [<ffffffff81793efc>] ret_from_fork+0x7c/0xb0 [15052.313544] [<ffffffff810963b0>] ? flush_kthread_worker+0xb0/0xb0 … === Also here is my lspci [2] and cpuinfo [3] as well. Vanilla 3.15.8 and 3.16.0 are affected as well as latest Ubuntu 3.13 kernel. No visible reason to trigger the bug. After hang machine doesn't respond via network, there's no disk IO, and also it doesn't respond to pressing power button in order to perform soft off. And here is kernel bugzilla bugreport [4]. [1] https://gist.github.com/085af9da81197faf6637 [2] https://gist.github.com/318ebda5576b099590b8 [3] https://gist.github.com/9c1307463c7ad6835b2d [4] https://bugzilla.kernel.org/show_bug.cgi?id=81701 --- ApportVersion: 2.14.1-0ubuntu3.3 Architecture: amd64 DistroRelease: Ubuntu 14.04 InstallationDate: Installed on 2014-07-30 (5 days ago) InstallationMedia: Ubuntu-Server 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.2) Package: linux (not installed) ProcEnviron: LANGUAGE=en_US:en TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash Tags: trusty Uname: Linux 3.16.0-031600-generic x86_64 UnreportableReason: The running kernel is not an Ubuntu kernel UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: _MarkForUpload: True To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1352567/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp