** No longer affects: xorg (Ubuntu)
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Title:
kernel panic in Radeon driver while screen blank
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After several weekends of testing, I believe I can report with high
confidence that the kernel update to 4.17-rc2 fixes the second of the
two problems; specifically, we no longer see kernel crashes after using
Alt-SysRq-k to recover from frozen/hanging blank screens.
However, the unable-to-unblank
Yes, I can test those this weekend ... if you have any specific advice
on updating the kernel, let me know, otherwise I'll use the notes here:
https://wiki.ubuntu.com/Kernel/MainlineBuilds
Thanks very much!
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Can you try latest mainline kernel in [0]?
You need these two binaries:
linux-image-unsigned*generic*.deb
linux-modules*generic*.deb
[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.17-rc2/
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Hit another kernel panic this weekend, again after having the screen go
blank and be unblankable via any normal method, then trying Alt-SysRq-k
and getting this panic (with a different stacktrace than the other, but
also going through the radeon driver and radeon_crtc_handle_flip).
I'll try to get
I think I've filled in all the necessary info -- and I have another
screenshot to upload too, once I get it off my phone, from another
kernel panic in the same context.
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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One further historical detail: when these machines were running 14.04.3
and we made the mistake of accepting the HardWare Enablement (HWE)
upgrade:
https://wiki.ubuntu.com/1404_HWE_EOL
which replaced the old fglrx driver with the radeon one, that's when we
first encountered this unable-to-unblank
OK ... I think that's all I can do for today. I've uploaded as
attachments to this original report all the files generated by apport-
bug today, and marked the other ticket as a duplicate.
(I apologize for that, but I can't use my personal Launchpad account
from the kiosks, and I'm only there onc
** Attachment added: "Xrandr.txt"
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1763273/+attachment/5117664/+files/Xrandr.txt
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Title:
k
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: xorg (Ubuntu)
Status: New => Confirmed
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Title:
kerne
** Attachment added: "xdpyinfo.txt"
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1763273/+attachment/5117665/+files/xdpyinfo.txt
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Title:
** Attachment added: "XorgLog.txt"
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1763273/+attachment/5117662/+files/XorgLog.txt
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** Attachment added: "LightdmLog.txt"
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1763273/+attachment/5117670/+files/LightdmLog.txt
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Ti
** Attachment added: "XorgLogOld.txt"
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1763273/+attachment/5117663/+files/XorgLogOld.txt
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Ti
** Attachment added: "xserver.outputs.txt"
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1763273/+attachment/5117666/+files/xserver.outputs.txt
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** Attachment added: "ProcCpuinfoMinimal.txt"
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1763273/+attachment/5117656/+files/ProcCpuinfoMinimal.txt
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** Attachment added: "ProcInterrupts.txt"
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1763273/+attachment/5117657/+files/ProcInterrupts.txt
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** Attachment added: "UdevDb.txt"
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1763273/+attachment/5117660/+files/UdevDb.txt
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Title:
k
** Attachment added: "UnitySupportTest.txt"
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1763273/+attachment/5117661/+files/UnitySupportTest.txt
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** Attachment added: "ProcModules.txt"
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1763273/+attachment/5117658/+files/ProcModules.txt
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** Attachment added: "JournalErrors.txt"
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1763273/+attachment/5117651/+files/JournalErrors.txt
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** Attachment added: "Dependencies.txt"
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1763273/+attachment/5117629/+files/Dependencies.txt
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** Attachment added: "ProcCpuinfo.txt"
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1763273/+attachment/5117655/+files/ProcCpuinfo.txt
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** Attachment added: "CurrentDmesg.txt"
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1763273/+attachment/5117628/+files/CurrentDmesg.txt
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** Attachment added: "Lsusb.txt"
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1763273/+attachment/5117654/+files/Lsusb.txt
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Title:
ker
** Attachment added: "Lspci.txt"
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1763273/+attachment/5117653/+files/Lspci.txt
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Title:
ker
** Attachment added: "LightdmDisplayLog.txt"
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1763273/+attachment/5117652/+files/LightdmDisplayLog.txt
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** Attachment added: "DpkgLog.txt"
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1763273/+attachment/5117630/+files/DpkgLog.txt
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Title:
Here are the details from apport-bug, as promised (copied from #1764211
because I had to use a different Launchpad account):
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: xorg 1:7.7+13ubuntu3
ProcVersionSignature: Ubuntu 4.4.0-119.143-generic 4.4.114
Uname: Linux 4.4.0-119-generic x86_64
.
While logged in via ssh to the machine with the "hung" Xorg (screen
blank, no way to recover except Alt-SysRq-k), I dumped the output of
Alt-SysRq-t into the syslog -- see attached file. Not sure this is much
use, however. Just trying to be complete while I'm on-site with a hung
machine.
** Atta
** Attachment added: "gdb-Xorg.txt"
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1763273/+attachment/5117324/+files/gdb-Xorg.txt
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Title:
** Attachment added: "Xorg.0.log"
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1763273/+attachment/5117322/+files/Xorg.0.log
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Title:
k
** Attachment added: "rom.vga.bin"
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1763273/+attachment/5117323/+files/rom.vga.bin
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Title:
Further debugging today while I'm on-site with the kiosks. The system
froze, as usual, after normal idle screen blanking. I was able to login
via ssh and retrieve some details.
First, it appears that the basic screen blanking problem is somehow
related to the Radeon driver. I will attach the Xo
Further details from apport-bug are in #1764211; I'll copy them into
this account using my "cdarroch" personal Launchpad account in a few
hours, when I get home.
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** Attachment added: "Full kern.log from April 1 crash"
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1763273/+attachment/5117229/+files/apr1.full.kern.log
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I'm only on-site with these kiosks once a week, but the next time I'm
there I will run apport-collect on one of the affected systems, and see
if we can't capture the problem. I'll also investigate whether there
are any messages in kernel log files, as best I can.
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** Also affects: xorg (Ubuntu)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu)
Importance: Undecided
Status: New
** No longer affects: ubuntu
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** Description changed:
I maintain a set of older kiosks running a mix of stock Ubuntu 14.04 LTS
and 16.04. As we have gradually transitioned them to 16.04, we have
- noticed that the machines running 16.04.3 now regularly exhibit problems
+ noticed that the machines running 16.04.1 now regul
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