** Description changed:
About once every two days since I updated to the 5.4.0-137-generic
kernel, ubuntu has partially frozen. This has happened three times so
far.
- In every case the freeze occurred when I tried to save a file that I had
- been working on for a while in emacs. The first indication of trouble is
- that the cursor disappears within the emacs window. If I move the cursor
- out of the window it reappears, but disappears again if I move it into
- the window. However even outside the window, nothing responds to mouse
- presses, although youtube audio continues to play from firefox.
+ In every case the freeze occurred when I tried to save the file that I
+ had been working on for a while in emacs. The first indication of
+ trouble was that the cursor disappeared within the emacs window. When I
+ moved the cursor out of the window the cursor reappeared, but then it
+ disappeared again when I moved it back into the emacs window. However
+ even outside the window, nothing responded to mouse presses, although
+ youtube audio continued to play from firefox.
- The last time that this happened, I had htop running in one virtual
- console terminal (VT), and a process that queried the CPU temperature
- every second in another. When the desktop froze, I was able to switch
- VT's and see that these were still running. However switching back to
- the GUI VT brought up nothing but a black screen and a flashing cursor.
+ The last time this happened, I was also running htop in one of the
+ virtual console terminals (VT3), and also a process that queried the CPU
+ temperature every second in another (VT4). When the desktop froze, I was
+ able to switch VT's and see that these were still running. However
+ switching back to the GUI VT brought up nothing but a black screen and a
+ flashing cursor.
The htop process in VT-3 showed many system processes were still running
in the background, and there was plenty of free memory.
- In the VT running by temperature monitor, I used Ctrl-C to get to the
+ In the VT running my temperature monitor, I used Ctrl-C to get to the
shell prompt. However bash couldn't find any executables, so I couldn't
run ls, df or anything else except bash's builtin commands. I concluded
that my laptop's disk had probably gone offline.
Since I couldn't run anything from the VT shell prompt, I tried using
htop to send a TERM signal to udiskd, naively hoping this might cause it
to restart and wake up the disk. However this crashed htop, and resulted
in a message from systemd saying that it was freezing execution.
At that point I used SysRq REISUB to reboot the laptop. However the boot
failed with a splash screen saying that there was no disk to boot from.
I ended up having to long-press the power button before it would see the
disk again and boot normally.
My guess is that the internal hard disk (Micron 2200S NVMe 256GB) went
into a low-power state during an interval when I wasn't writing anything
to disk, and then it failed to wake up.
To verify that the offending disk doesn't have any problems, I have
since used the nvme command to check the disk's smart log and error log.
No errors had been recorded, and it still has available_spare at 100%,
so it appears to be healthy.
For the moment I am going to switch back into the 136 kernel for a few
days (or until it freezes), to confirm whether the freezes are kernel
related. If that doesn't work, I will try disabling apst power-
management at boot time. In the meantime, I'd be interested to hear any
suggestions anyone has for diagnosing and resolving this problem.
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-5.4.0-137-generic 5.4.0-137.154~18.04.1
ProcVersionSignature: Ubuntu 5.4.0-137.154~18.04.1-generic 5.4.218
Uname: Linux 5.4.0-137-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.28
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Fri Feb 10 12:05:02 2023
DistributionChannelDescriptor:
- # This is the distribution channel descriptor for the OEM CDs
- # For more information see
http://wiki.ubuntu.com/DistributionChannelDescriptor
- canonical-oem-somerville-bionic-amd64-20180608-47+italia-whl+X37
+ # This is the distribution channel descriptor for the OEM CDs
+ # For more information see
http://wiki.ubuntu.com/DistributionChannelDescriptor
+ canonical-oem-somerville-bionic-amd64-20180608-47+italia-whl+X37
InstallationDate: Installed on 2019-08-22 (1267 days ago)
InstallationMedia: Ubuntu 18.04 "Bionic" - Build amd64 LIVE Binary
20180608-09:38
SourcePackage: linux-signed-hwe-5.4
UpgradeStatus: No upgrade log present (probably fresh install)
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux-signed-hwe-5.4 in Ubuntu.
https://bugs.launchpad.net/bugs/2006807
Title:
Ubuntu freezes and disk inaccessible until next boot
Status in
