** Changed in: linux (Ubuntu)
Status: Triaged => Fix Released
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https://bugs.launchpad.net/bugs/1904054
Title:
kernel 5.8 general protection fault at boot
Status in
As of 5.8.0-40-generic (and possibly the previous version as well) this
issue seems to be 100% resolved for me.
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Title:
kernel 5.8
Just tried the newly released 5.8.0-31-generic, but I'm still seeing the
GPFs (see attached screenshot).
I'm continuing to run with the mainline 5.9.10 kernel that I mentioned
previously, not ideal since I had to switch to the upstream openzfs-2.0
release which supports the 5.9 kernel.
**
Interestingly 5.9.10-050910-generic (from the mainline kernel ppa that
was mentioned earlier) is booting and running stably.
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Title:
Anything else I can try to further debug this issue?
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Title:
kernel 5.8 general protection fault at boot
Status in linux package
Tried the recently released ubuntu linux kernel 5.8.29 just now, still
getting the GPFs. Attaching the output of "journalctl -xb" from that
failed boot (I was dropped into "emergency mode").
** Attachment added: "journalctl -xb output from failed boot of ubuntu kernel
5.8.0-29"
OK, after a lot of kernel package installs and rebooting...
Mainline kernel version 5.8.5-050805 boots and runs successfully.
But the *next* version (5.8.6-050806) generally fails to boot,
exhibiting the pattern of GPFs and occasional kernel panics. Once it
booted up all the way, but the system
Thanks Ben, that's much appreciated.
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Title:
kernel 5.8 general protection fault at boot
Status in linux package in Ubuntu:
Mainline kernel version 5.8.0-050800-generic boots up without any
issues.
Mainline kernel version *5.8.18-050818-generic* doesn't (GPF and kernel
panics).
I'll work backwards from 5.8.18-050818-generic to see when the GPFs and
kernel panics go away.
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It maybe worth checking with one or more of the mainline kernels to see
if these behave differently from the Ubuntu kernel just to see if they
boot fine or if they suffer from the same issue.
The mainline kernels can be found in https://kernel.ubuntu.com/~kernel-
ppa/mainline
For example, it may
I updated GRUB_CMDLINE_LINUX_DEFAULT. I was able to boot to multiuser
mode once (kernel boot log for that is attached, titled "kern.log.debug-
successful"). The system locked up shortly after I stashed a copy of
that log.
** Attachment added: "Successful boot of 5.8.0-28-generic (which
Subsequent attempts to boot the 5.8.0-28-generic kernel exhibited GPFs
and at least one full kernel panic, screenshot of that is attached.
Ubuntu kernel version 5.4.0-52-generic remains the only stable option at
the moment.
** Attachment added: "kernel panic with 5.8.0-28-generic"
I may be useful to add "debug ignore_loglevel" to the kernel boot
command line to get more debugging information during boot to see which
module is tripping this issue.
edit the /etc/default/grub (as the root user) and add the debug and
ignore_loglevel keywords to the GRUB_CMDLINE_LINUX_DEFAULT
Ah, according to the openzfs release notes, openzfs version 0.8.4 (the
current version in the ubuntu repositories) isn't compatible with kernel
versions later than 5.6. Presumably this is the issue. I guess I'll
stick with kernel 5.4.x until update ZFS packages are released.
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I was able to successfully boot with upstream kernel version:
5.10.0-051000rc3-generic
This kernel package notably does not include the ZFS kernel modules (and
those kernel modules did not build when I installed zfs-dkms). So it
does seem possible that the bug I'm encountering relates to ubuntu
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