CC+ Mark Pearson from Lenovo Full thread is here: https://lore.kernel.org/all/YwDsy3ZUgTtlKH9r@xxxxxxxxx/ On Mon, Sep 12, 2022 at 11:48 AM Jason A. Donenfeld <Jason@xxxxxxxxx> wrote: > > Ah another thing: > > On Mon, Sep 12, 2022 at 11:45 AM Jason A. Donenfeld <Jason@xxxxxxxxx> wrote: > > My machine went through three changes I know about between the threshold > > of "not crashing" and "crashing": > > - Upgraded to 5.19 and then 6.0-rc1. > > - I used my laptop on batteries for a prolonged period of time for the > > first time in a while. > > - I updated KDE, whose power management UI elements may or may not make > > frequent calls to this subsystem to update some visual representation. > > - Updated my BIOS. GASP! The plot thickens. It appears that the BIOS update I applied has been removed from https://pcsupport.lenovo.com/fr/en/downloads/ds551052-bios-update-utility-bootable-cd-for-windows-10-64-bit-and-linux-thinkpad-p1-gen-4-x1-extreme-gen-4 and now it only shows the 1.16 version. I updated from 1.16 to 1.18. The missing release notes are still online if you futz with the URL: https://download.lenovo.com/pccbbs/mobiles/n40ur14w.txt https://download.lenovo.com/pccbbs/mobiles/n40ur15w.txt One of the items for 1.17 says: > - (Fix) Fixed an issue where it took a long time to update the battery FW. So maybe something was happening here... I'm CC'ing Mark from Lenovo to see if he has any insight as to why this BIOS update was pulled. Maybe the battery was appearing and disappearing rapidly. If that's correct, then it'd indicate that this bandaid patch is *wrong* and what actually is needed is some kind of reference counting or RCU around that sysfs interface (and maybe others). Jason
