Iām 3.05 since Beta and noticed that periodically and suddenly at random times my computer slows down dramatically, i.e. imagine normal function of everything but at 200MHz instead of >2GHz - mouse movements are laggy, video starts chopping.
Iām on Fedora 41 KDE. I thought it was GPU originally but there are no errors in the logs at all related to the GPU. The only error I could find in the last slowdown that happened was:
kwin_libinput: Libinput: event4 - PIXA3854:00 093A:0274 Touchpad: client bug: event processing lagging behind by 247ms, your system is too slow
Iāve had that happen once. CPU wouldnāt go above 500MHz on any core (noticed it being laggy then confirmed via /proc/cpuinfo). For me what fixed it was unplugging and then replugging the charging cable.
Hasnāt happened since, even on the same charger (I was/am using the 70W(?) or so Apple MacBook brick I got laying around)
I have seen it also on my FW16, but not often.
I have not tracked down the source but I have not discounted the following yet:
IRQ storm. Maybe some GPE interrupt being kicked off unnecessarily.
USB storm. I.e. one device on the USB bus that is preventing others from working. This might be one of the chips on the mainboard misbehaving, so not necessarily an external device. I donāt know which.
For me this problem appeared only after installing this BIOS patch and never before. My problem also started at random, not associated with TB dock disconnect.
I had that happen once pre 3.05. Unplugging and then plugging in the charger seemed to fix it. Iām using Windows 11 Pro though. And itās never been a reproducible behavior.
Another thing I started noticing thatās definitely new as of 3.0.5: Often after a wake from hibernate, the USB-C PD sensors (via Linux sensors / lm-sensors) all report 0 V / 0 A, even if a power adapter is plugged in and the laptop reports being charged (and the LED next to the port is on).
Unplugging and plugging it back in makes the Voltage / Current show up correctly.
Not sure if this is connected in any way to the other power issues people have been seeing, and just a minor symptom of it?