4.6 / 4.8 EOL, please feel free to open a new bug is you're still seeing
this issue.
** Changed in: linux (Ubuntu)
Status: Incomplete => Won't Fix
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This is quite late, but to let everyone know: later releases of 4.8
screwed up everything again. Lockups after user switching. Falled back
to the 4.4 branch, where
[87274.633194] [ cut here ]
[87274.633227] WARNING: CPU: 3 PID: 22315 at
I would have been working on that but for now have no time at all and,
honestly, too little motivation. 4.8 kernel works like a charm.
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https://bugs.launchpad.net/bugs/1583817
Title:
Hello, I am also affected by this bug (Ubuntu 16.04 x86_64, Thinkpad
T420). Is anybody working at bisecting the kernel as Christopher asked
in the previous comment? Thanks.
holden@lynx:~$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 16.04.1 LTS
Release:
Ilya G. Ryabinkin / Oliver Leitner, the next step is to fully reverse
commit bisect from kernel 4.6 to 4.8-rc4 in order to identify the last
bad commit, followed immediately by the first good one. Once this good
commit has been identified, it may be reviewed for backporting. Could
you please do
Here are relevant links:
https://bugzilla.redhat.com/show_bug.cgi?id=1372924
https://lkml.org/lkml/2016/8/29/105
** Bug watch added: Red Hat Bugzilla #1372924
https://bugzilla.redhat.com/show_bug.cgi?id=1372924
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Well, I have tested:
ilya@thinkpad:~$ uname -a
Linux thinkpad 4.8.0-040800rc4-generic #201608312129 SMP Thu Sep 1 01:31:59 UTC
2016 x86_64 x86_64 x86_64 GNU/Linux
Installation was smooth except the complaints about missing firmware---I
dismissed these warnings. A new kernel hang after the very
Ilya G. Ryabinkin, please see
https://wiki.ubuntu.com/Kernel/MainlineBuilds .
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Title:
WARNING: CPU: 1 PID: 865 at
Remind me, how to do that?
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Title:
WARNING: CPU: 1 PID: 865 at
/home/kernel/COD/linux/drivers/gpu/drm/drm_irq.c:1326
Ilya G. Ryabinkin, it is most helpful to keep this relevant to upstream
by testing the latest mainline kernel (now 4.8-rc4) as it is released.
Could you please advise?
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Bug is still there with the most recent update:
ilya@thinkpad:~$ uname -a
Linux thinkpad 4.4.0-36-generic #55-Ubuntu SMP Thu Aug 11 18:01:55 UTC 2016
x86_64 x86_64 x86_64 GNU/Linux
It can be triggered by VT switching *after* some time the system is up.
Below is the piece of dmesg log:
The problem is *not* fixed by other updates at the time of writing the
post---the fully updated system (16.04.1@thinkpad x220) has the same
issue.
It is invariably happening when the "Switch user" capability is
employed, in other words when a second instance of Xord is in use. The
laptop actually
Problem may have been fixed in new upgrades.
Several packages have been upgraded by Ubuntu since reporting bug - a dpkg.log
list is attached. Also removed xserver-xorg-video-intel as Ubuntu recommend not
to use it for newer PCs. System has now been stable for a day, even with 2 USB
mice.
Same problem with a clean Ubuntu 16.04.1 install.
Hewlett-Packard HP Compaq 8200 Elite SFF PC/1495, BIOS J01 v02.06 06/09/2011
1 usb keyboard and 1 usb mouse
VGA compatible controller: Intel Corporation 2nd Generation Core Processor
Family Integrated Graphics Controller (rev 09)
First login is
I get the same problem running kubuntu after upgrading from 14.04 to
16.04.1. I normally have 2 USB mice connected, but this version of
Kubuntu locks up as soon as I try to use the second mouse, so there were
problems with first boot after the upgrade. It has also locked once with
only one mouse.
** Changed in: linux (Ubuntu)
Status: Confirmed => Triaged
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Title:
WARNING: CPU: 1 PID: 865 at
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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Title:
WARNING: CPU: 1 PID: 865 at
i got told to put the bug on freedesktop bugtracker...
https://bugs.freedesktop.org/show_bug.cgi?id=95558
** Bug watch added: freedesktop.org Bugzilla #95558
https://bugs.freedesktop.org/show_bug.cgi?id=95558
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i dont know, i dont remember whats been going on in dmesg over 2 years
ago;-)
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Title:
WARNING: CPU: 1 PID: 865 at
Oliver Leitner, to clarify, did this problem not occur in a release
prior to 15.04 or kernels prior to 3.6.x?
** Tags added: vivid wily
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Title:
hi Chris.
Thank you for letting me know the upstream downstream streamwalz=)
about your follow up:
1. yes
2. yes
i can confirm this bug going back to 3.6.x kernels, ive had it since
15.04.
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Oliver Leitner, couple of follow up questions:
1) Did this problem not occur in a release prior to Xenial?
2) Does this continue if you remove all of the non-default kernel parameters
presently being used:
acpi_os_name=Microsoft Windows NT" acpi_sci=low agp=off consoleblank=0
enable_mtrr_cleanup
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