Not sure if it helps, but I have a hunch this might have to do something with the CPU on which the kernel is running (CPU bugfixes maybe? spectre/meltdown and newer problems) In my case, I've not seen this problem with recent 5.4 kernels on CPU type 06-3c-03 (Intel(R) Core(TM) i7-4720HQ CPU @ 2.60GHz), not on a CPU 06-9e-09 (Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz), but it does occur on older CPUs of type 06-25-05 and 06-2a-07 when running kernel 5.4.0 generic.
Recently tested kernels on Bionic/Focal, apt up-to-date and using most recent available microcode: Linux version 5.4.0-65-generic 20.04 - CPU 06-2a-07 (16GB RAM) - bad blocks on zram when swapping. Linux version 5.4.0-64-lowlatency 18.04 - CPU 06-9e-09 (16GB RAM) - no zram bad blocks. Notes: I've seen the issue with recent 5.4 kernels for a while now, the bisecting Michele Primavera did seems plausible to me, so it's not 64=>65. Kernel 4.15 (Bionic) does not seem to cause zram corruption at all. I haven't tested Focal's kernel 5.8 yet... -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1900166 Title: CPU freezes and system reboots To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-signed-hwe-5.4/+bug/1900166/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
