Control: tags -1 - patch Control: notfound -1 3.16.81-1 Control: notfound -1 4.19.87-1 Control: notfound -1 5.4-1~exp1 Control: forwarded -1 https://bugzilla.kernel.org/show_bug.cgi?id=207245
Hey Ben. On Fri, 2020-04-17 at 18:02 +0100, Ben Hutchings wrote: > This is now neither "fixed" nor "found" in any 5.5 version. Please > update the versions properly. Took a while till I got the mail that the bug was unarchived so I didn't update everything immediately. > This is also tagged "patch" but without a direct link to the > patch(es) > that are supposed to fix it. (Linking to the upstream bug report is > not specific enough.) Sorry for the confusion I might have caused. The patch tag and also found-in-version was based on my guess that the problems I see since versions > 5.2 were caused by https://gitlab.freedesktop.org/drm/intel/issues/614 That bug was a regression introduced by a security fix that prevented the GPU from entering RC6 sleep states. perf showed me that I was affected by it, so I assumed the fix (which was introduced in 5.5rc-something) would solve everything. It didn't, as my fruther test series, which I've just sent to this Debian as well, showed. Even with 5.5 I see a tremendous temperature increase. Unfortunately I'm by far not an expert enough to really tell where the problem comes from (I'd say there may be even different problems involved)... and I'd also need guiding what to actually test, to better nail it down. When I saw the problem still occurs with 5.5, I've made another test series and reported it first at lkml: https://lore.kernel.org/lkml/ce8097694ddfab616616f8f81521495d99c74416.ca...@scientia.net/T/#u When I got no response I've updated my older ticket at intel-drm: https://gitlab.freedesktop.org/drm/intel/-/issues/953 My tests would indicate that there are a number of temperature problems, in short: - GPU intensive stuff (like playing videos) - GPU stuff which shouldn't be intensive at all (e.g. moving around windows) but also: - supposedly non-GPU intensive stuff like Alt-Tab-ing between windows, scrolling up/down in lists in the GUI) - stuff which doesn't even do graphics at all (see the unhide-brute and (SHA)-verify tests I've made. For the GPU-intensive stuff (specifically that I hit 100°C when I play any videos) there is: https://gitlab.freedesktop.org/drm/intel/issues/956 (intel-drm folks had asked me to put it in a separate issue) For the general stuff (e.g. unhide brute or SHA512 verification running much hotter), there is: - the post to lkml - https://bugzilla.kernel.org/show_bug.cgi?id=207245 - and since intel_pstate being enabled there's also: https://bugzilla.kernel.org/show_bug.cgi?id=207247 The different tickets contain also descriptions of symptoms I've see, e.g. where temperatures go through the roof even when just moving windows, Alt-Tab-switching between them, scrolling up/down in a window, and so on. See especially the plots in the git repo I've provided, which shows how much higher the temperature is from 5.2 to 5.5 (and for each of them for intel_pstate being on or off). Any help on what to test would be highly appreciated. I did some preliminary tests with perf record, while then e.g. scrolling up/down in a GUI window (used the mail list in Evolution) while the temperatures go up to ~80°C ... This would have indicated that during that, the number of events as recorded by perf record, grows by a magnitude. I haven't had time yet to make more systematic tests. Thanks, Chris.
