> 1. After successful boot, I've noticed, that buttons above the > touchpad[1] stopped working. Tried to debug the thing, but they do > nothing even under xev or in showkey - seems like they dead. Didn't find > anything interesting by searching the net. >
Longshot (since i've had one instance in the last few years where i need to rebuild xorg after a kernel update) have you tried rebuilding the xf86-input-* packages against the new kernel? > > 2. This one is more annoying. After boot to the new shiny 4.x kernel, > devices connected via the usb seems to have aggressive power safe mode. > For example - if I typing for a while everything is fine, if I stop for > a couple of seconds, and then start to type, for approximately 2 seconds > there is no response from the device, and after that i can type again. > Note, that during those 2s no buffering is done, so whatever I'm typing > in this short period, is lost. Same goes to the mouse movement and > buttons. > I haven't had much luck with USB power saving working in a useful way and leave it off. Strange its been enabled by default for you. cat /sys/bus/usb/devices/*/power/control will show you what the current settings are. The options are on/auto. "on" means that the device should be resumed and autosuspend is not allowed. so that's what you want. It can blanket set with; echo on | tee /sys/bus/usb/devices/*/power/control Or you could work out which devices are actually a problem and just "on" those particular ones.
