On 03/17, Guillermo Ramos wrote: > El 17/3/22 a las 13:18, Dave Voutila escribió: > > > > Guillermo Ramos <gra...@gramos.me> writes: > > > > > Hey misc, > > > > > > First time posting to the list, nice to meet you :) > > > > > > I have just installed -current on a Thinkpad T480 and I'm seeing this > > > annoying behavior where, after waking up from either S3 or S4, one of > > > the CPU cores gets to 100% and won't go down until the machine is > > > restarted. According to htop, the guilty process is the 'acpi0' kernel > > > thread. This happens both with the laptop plugged to external power and > > > on battery. > > > > > > Any ideas about what could be happening here, or where to look at for > > > clues? I've tried monitoring /var/log/messages during the sleep+wakeup > > > process but I see nothing suspicious apart from those DRM notices, which > > > I don't know how to interpret. > > > > > > > Can you use systat or `vmstat -i` and see what your interrupt rates look > > like? Sounds like an interrupt storm. With that info I'd recommend using > > sendbug to report the details to bugs@. > > Thanks Dave for the anwer. You're right: after some time, the irq96/acpi0 > count gets higher than irq0/clock. I will sysupgrade again (just in case) > and submit a bug report. > > Guillermo. >
Hi, I've had a similar problem on my t480s. It turned to be some thunderbolt/acpi table issue. Copying a previous email from here: "ok, so apparently this is an old issue with the ACPI tables on the t480 series. As it happens the user who detailed it on the Lenovo forums was using OpenBSD too: https://forums.lenovo.com/t5/Other-Linux-Discussions/FYI-Linux-May-Not-Support-Thunderbolt-Native-Mode/m-p/4057604?page=1#4064963 Not an OpenBSD issue at all." Try disabling Thunderbolt from BIOS / IO control and see if this persists. Cheers, Mihai --
