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FS#71575 - watchdog: BUG: soft lockup - CPU | Dell XPS 13 9310

Attached to Project: Arch Linux
Opened by Maximilian Konter (Biskit1943) - Wednesday, 21 July 2021, 17:02 GMT
Last edited by Toolybird (Toolybird) - Tuesday, 06 June 2023, 03:30 GMT
Task Type Bug Report
Category Kernel
Status Closed
Assigned To Jan Alexander Steffens (heftig)
David Runge (dvzrv)
Architecture x86_64
Severity High
Priority Normal
Reported Version
Due in Version Undecided
Due Date Undecided
Percent Complete 100%
Votes 1
Private No



Laptop freezes after system start (sway).

Since the latest kernel update (linux 5.13.4.arch1-1) the laptop freezes after the window manager started. It took me four tries to gather these logs and I wasn't able to collect more...

Additional info:

output of dmesg in attachments

Steps to reproduce:

Update kernel and use a damn Dell XPS 13 9310


Disabling "Intel SmartStep" in the BIOS resolved the issue but lead to a higher fan noise (but also more power).
This task depends upon

Closed by  Toolybird (Toolybird)
Tuesday, 06 June 2023, 03:30 GMT
Reason for closing:  Upstream
Additional comments about closing:  Old and stale. And clearly an upstream issue. If still happening, please report upstream to the kernel folks.
Comment by Maximilian Konter (Biskit1943) - Monday, 26 July 2021, 05:48 GMT
Without updating the Kernel, I wasn't able to use the laptop today. I tried to install linux-lts, which did not succeeded within 10 boots and I used the rescue usb then. Now I don't have these messages and the laptop is working ... for now.

Regarding the "workaround" I got confused, I disabled "Intel SmartShift" and later "Intel SpeedStep". The first one had a short effect, but the second one not. With the LTS kernel I have both enabled and no problems so far.
Comment by env (ENV25) - Friday, 30 July 2021, 08:10 GMT
I have a similar issue.

Can you verify if this issue only happens when rebooting. Try fully powering off, then booting again with the latest kernel.
Comment by Sebastian (archi42) - Tuesday, 22 February 2022, 13:50 GMT
Eight month later, this still seems to affect the current kernel versions; I'm on 5.16.10-arch1-1, but the problem is bugging me since I got the laptop in December 2021 (I think that was on kernel 5.14 then?).
The lock up happens within a few minutes after boot, or the system runs fine for days.
Hardware: XPS 13 9310 "developer edition" from Q4 2021 (that's the one with Ubuntu pre-installed, but I'm not using that).
Intel SmartStep is at default settings (I suppose it's on?). I'll try the workaround.

The attached dmesg log is from `journalctl -k -b -1 -o short-precise`; the system locked up hard (after a few short lock ups) and I had to reboot.

//edit: Obviously, if you need any more info, please ask. I'd be happy to help investigating :)
Comment by Jan Alexander Steffens (heftig) - Wednesday, 23 February 2022, 03:07 GMT seems to be the same issue. They mention blacklisting `hci_uart` seems to work around the lockups, at the cost of disabling Bluetooth.