On Mon, Nov 27, 2023 at 11:38:01AM -0700, Theo de Raadt wrote: > Mike Larkin <mlar...@nested.page> wrote: > > > On Mon, Nov 27, 2023 at 01:05:56PM -0500, Laurent Cimon wrote: > > > Hi, > > > > > > > > > The CPU0 on my Thinkpad 480 is always running at around 100%. It's on > > > OpenBSD 7.4. > > > > > > It seems to be doing this in the kernel. > > > > > > > > > Here is the CPU's line from top(1). > > > > > > CPU0: 0.0% user, 0.0% nice, 79.3% sys, 3.8% spin, 16.3 > > > > > > > > > It's always this specific CPU, and it's been draining my battery. > > > > > > How do I find what causes this? > > > > > > > > > I think that it starts doing it after waking from sleep, as it doesn't do > > > it > > > when the system is freshly started. > > > > > > But I'd need to do some tests before verifying this. > > > > > > > > > Laurent > > > > > > > Please search the list, this has been reported and solved many times, > > specifically for this machine. > > > > It is not solved. > > There is a "workaround" > > We do something wrong by not managing thunderbolt, but it is not clear > what we are supposed to do. My theory is that thunderbolt is initialized > far enough by BIOS or chipset default configuration or our driver, that > interrupts occur which we don't handle, and spin. >
fair enough, that's a more accurate description.
