On Wed, Jan 11, 2017 at 03:26:06PM +0100, Paul Menzel wrote: > Dear Tomas, > > > On 01/11/17 15:12, Winkler, Tomas wrote: > > > > > On 01/11/17 10:24, Winkler, Tomas wrote: > > > > > > > > > > > > On Wed, Jan 11, 2017 at 01:27:21AM +0200, Tomas Winkler wrote: > > > > > > > On older platforms the command should be just ignored by the > > > > > > > firmware but some older platforms misbehave so it's safer to send > > > > > > > the command only if required. > > > > > > > > > > > > Thanks! This fixes suspend-to-ram for me (on a Thinkpad x201s). > > > > > > > > > > What about Dell XPS13? > > > > > > > > With Linus' master branch from today, and Greg's char-misc-linus > > > > merged > > > > (Merge: 807b93e995d1 546cf3ef9c92), the regression is still there. > > > > > > Hmm, this should work on KBL.... > > > > > > > I am now building a Linux kernel image with the two commits touching > > > > `bus- fixup.c` reverted. > > > > > > Thanks for the effort. > > > > > > > Do you want me to open a separate bug report for that, or continue > > > > debugging in the existing report [1], which is currently marked as > > > > resolved? > > > > > > Let's get some more data, shouldn't take long time. > > > > > > > > Do you have Kaby Lake devices sitting around for testing? > > > > > > We will of course try to reproduce the issue locally. > > > > Paul, currently we cannot reproduce this issue on Kaby Lake platforms on > > our side, > > It looks like it’s a different issue. Reverting the two commits touching > `bus-fixup.c`, did not help. > > > we would be great for more debug data from your side. > > You can get more info by enabling mode debug logs > > > > echo -n 'module mei +lfp' > /sys/kernel/debug/dynamic_debug/control > > echo -n 'module mei_me +lfp' > /sys/kernel/debug/dynamic_debug/control > > I am currently bisecting to find the culprit. 13 steps will take some time > though.
I can duplicate this on my laptop here as well :( Did you get anywhere with your bisection? thanks, greg k-h