Possible regression with kernel 6.1.0 freezing (6.0.14 is fine) on haswell laptop

[Sergio Callegari <sergio.callegari@gmail.com>]

Hi,

just a short note to report regular freezes with kernel 6.1.0 on a 
haswell laptop quad core Intel Core i7-4750HQ (-MT MCP-) with integrated 
graphics.

- system only freezes when launching the desktop environment (working on 
a text console while having the sddm login screen up, without logging 
in, does not seem to cause the issue);

- freezes happens a few seconds to a few minutes after getting to the 
desktop environment (that uses opengl and composition). Freeze happens 
both on X11 or Wayland.

- freeze seems to cause data loss (system not able to complete writes 
when the freeze occurs, data structures on disk get corrupted, e.g. 
system complained on broken btrfs snapshots made by timeshift-like app).

- system on freeze ceases responding to ping from the outside;

- upon reboot I cannot find any trace of any issue in the journal;

- on the same system booting kernels up to 6.0.14 is OK.

Seen using a distro kernel, but it should be fairly mainline (manjaro/arch).

Reported to the distro, but seems serious enough to report here too.

Thanks,

Sergio