This bug is missing log files that will aid in diagnosing the problem.
While running an Ubuntu kernel (not a mainline or third-party kernel)
please enter the following command in a terminal window:
apport-collect 2011748
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/2011748
Title:
lunar/linux 6.2 fails to boot on arm64
Status in linux package in Ubuntu:
Incomplete
Status in linux source package in Lunar:
Incomplete
Bug description:
[Impact]
On certain bare metal arm64 boards the latest lunar/linux
6.2.0-17-generic fails to boot, the kernel gets stuck reporting the
following oops:
[ 72.043484] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
[ 72.049571] rcu: 22-...0: (30 GPs behind)
idle=b10c/1/0x4000000000000000 softirq=164/164 fqs=6443
[ 72.058520] (detected by 28, t=15005 jiffies, g=449, q=174 ncpus=32)
[ 72.064949] Task dump for CPU 22:
[ 72.068251] task:kworker/u64:5 state:R running task stack:0
pid:447 ppid:2 flags:0x0000000a
[ 72.078156] Workqueue: efi_rts_wq efi_call_rts
[ 72.082595] Call trace:
[ 72.085029] __switch_to+0xbc/0x100
The bug doesn't seem to happen on arm64 virtual machines, it happens
only on physical arm64 systems.
[Test case]
Boot the kernel on a physical arm64 board (i.e., kuzzle in our lab).
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