I upgraded from kernel 3.16 to 3.17 and sometimes when I watch a video on Youtube or play a audio file, the system freezes (no keyboard, no mouse) and I have to hard reset it. I found it in the log: Oct 9 00:01:58 tux kernel: [33765.901479] INFO: rcu_preempt detected stalls on CPUs/tasks: { 3} (detected by 0, t=60002 jiffies, g=298657, c=298656, q=0) Oct 9 00:01:58 tux kernel: [33765.901484] Task dump for CPU 3: Oct 9 00:01:58 tux kernel: [33765.901485] plugin-containe R running task 0 9568 1003 0x00080008 Oct 9 00:01:58 tux kernel: [33765.901487] ffff880063b9ba90 ffffffff8139536f 000000000000a000 0000000000000286 Oct 9 00:01:58 tux kernel: [33765.901489] ffff880063b9ba78 ffffffff8108aef0 ffff880063b9bab0 00000000ffffffff Oct 9 00:01:58 tux kernel: [33765.901490] 0000000000000286 ffff880063b9baa0 ffffffff8108b46c 0000000000000286 Oct 9 00:01:58 tux kernel: [33765.901492] Call Trace: Oct 9 00:01:58 tux kernel: [33765.901497] [<ffffffff8139536f>] ? __schedule+0x27f/0x7d0 Oct 9 00:01:58 tux kernel: [33765.901500] [<ffffffff8108aef0>] ? lock_hrtimer_base.isra.31+0x20/0x50 Oct 9 00:01:59 tux kernel: [33765.901502] [<ffffffff8108b46c>] ? hrtimer_try_to_cancel+0x6c/0x80 Oct 9 00:01:59 tux kernel: [33765.901504] [<ffffffff8139920b>] ? schedule_hrtimeout_range_clock+0xab/0x140 Oct 9 00:01:59 tux kernel: [33765.901506] [<ffffffff810d82e9>] ? zone_statistics+0x79/0x90 Oct 9 00:01:59 tux kernel: [33765.901508] [<ffffffff810d82e9>] ? zone_statistics+0x79/0x90 Oct 9 00:01:59 tux kernel: [33765.901509] [<ffffffff810d82e9>] ? zone_statistics+0x79/0x90 Oct 9 00:01:59 tux kernel: [33765.901512] [<ffffffff810c707b>] ? get_page_from_freelist+0x52b/0x900 Oct 9 00:01:59 tux kernel: [33765.901514] [<ffffffff810c7731>] ? __alloc_pages_nodemask+0xe1/0x950 Oct 9 00:01:59 tux kernel: [33765.901515] [<ffffffff810cb8a1>] ? release_pages+0xa1/0x1e0 Oct 9 00:01:59 tux kernel: [33765.901518] [<ffffffff81069f40>] ? __enqueue_entity+0x70/0x80 Oct 9 00:01:59 tux kernel: [33765.901519] [<ffffffff8106cba5>] ? enqueue_task_fair+0xd25/0xf60 Oct 9 00:01:59 tux kernel: [33765.901521] [<ffffffff81063362>] ? check_preempt_curr+0x52/0x90 Oct 9 00:01:59 tux kernel: [33765.901522] [<ffffffff810633b2>] ? ttwu_do_wakeup+0x12/0x90 Oct 9 00:01:59 tux kernel: [33765.901524] [<ffffffff81063508>] ? ttwu_do_activate.constprop.75+0x58/0x60 Oct 9 00:01:59 tux kernel: [33765.901525] [<ffffffff81065c9b>] ? try_to_wake_up+0xeb/0x340 Oct 9 00:01:59 tux kernel: [33765.901526] [<ffffffff81065f3b>] ? wake_up_state+0xb/0x10 Oct 9 00:01:59 tux kernel: [33765.901528] [<ffffffff8109a77f>] ? wake_futex+0x5f/0x80 Oct 9 00:01:59 tux kernel: [33765.901530] [<ffffffff8109cf0d>] ? do_futex+0x86d/0xa30 Oct 9 00:01:59 tux kernel: [33765.901531] [<ffffffff81087413>] ? rcu_eqs_enter+0x93/0xa0 Oct 9 00:01:59 tux kernel: [33765.901533] [<ffffffff81087ebe>] ? rcu_user_enter+0xe/0x10 Oct 9 00:01:59 tux kernel: [33765.901535] [<ffffffff810103ed>] ? syscall_trace_leave+0x5d/0x90 Oct 9 00:01:59 tux kernel: [33765.901537] [<ffffffff8139a47d>] ? int_check_syscall_exit_work+0x34/0x3d **** If you need more information, just ask. Thanks.
Nobody?
Hi! I've got at least four or five harde freezes during the last weeks, but wasn't able read anything from the log afterwards (turned off through power-button). Maybe this is a bug. How do you retrieve the log (journalctl? dmesg? ssh-remote?)?
(In reply to Peter Weber from comment #2) > Hi! > I've got at least four or five harde freezes during the last weeks, but > wasn't able read anything from the log afterwards (turned off through > power-button). Maybe this is a bug. How do you retrieve the log (journalctl? > dmesg? ssh-remote?)? Hi Peter. I retrieved from the normal syslog file. Does the output help with something? If you need more information, just ask.
Created attachment 155211 [details] full log from systemd journalctl, freeze around 11:51 - 11:52
Created attachment 155221 [details] kernel log from sytstemd journalctl, freeze around 11:51 - 11:52
I've attached two log files, which look different than yours in general. I'm running Archlinux with a self compiled kernel (not much changed in last months, just usual make oldconfig). The last line from the full log, shows that the system is still running, systemd has noticed that I pressed the power button. It is a classic freeze of STDIO/STDOUT, therefore not keyboard input possible and the cursor has stopped blinking. Maybe your kernel log-level differs (mine should be 4 i.e. the default).
Sorry for flooding. Yes, I've undocked/docked the laptop in my despair :)
(In reply to Peter Weber from comment #6) > Maybe your kernel log-level differs (mine should be 4 i.e. the default). Maybe your case is another issue? My log has a "Call trace", but yours don't.
I'm afraid your right. Which wouldn't help either of us :-(
This bug was fixed in recent kernels.