On Sunday, September 24, 2017 at 8:52:32 AM UTC, Michael Strasser wrote:
> Hi!
> 
> I've been experiencing some strange issues recently, which I can't
> really pin down on anything in particular.
> 
> * I've been getting a frozen screen after random periods of time when
> I've been using two different monitors. Usually the only solution is to
> kill my machine.
> 
> * Sometimes (again when using multiple screens) just mouse input and
> keyboard input from my laptop stop working, although mouse input from my
> USB mouse keeps working.
> 
> * My laptop monitor has input "freezes" all the time (i.e. after about
> 4-7 keypresses there is a delay of about 1 second until the input is
> processed), but I do not experience the same on my second monitor and I
> only experience them in AppVMs, not in dom0.
> 
> * I can no longer put applications into fullscreen mode on my laptop
> monitor - no input is recognized and the app "freezes" until I quit
> fullscreen mode (at which point the input made in fullscreen mode is
> delivered to/visible in the application) - fullscreen mode works fine on
> my second monitor.
> 
> I'm using Qubes 3.2 with i3, but I experienced the same problems with xfce.
> 
> At first I thought this was a hardware issue, but I just tried booting
> Ubuntu 16.04 from a USB stick and couldn't reproduce any of the issues.
> I also just noticed that input "freezing" just happens in AppVMs, not in
> dom0.
> 
> I have no idea what is causing these issues, I've been using Qubes OS
> since April and everything was fine, until about 1 1/2 months ago when
> these problems started to arise. I also couldn't find any connection to
> work load or anything performance related that would explain the issues.
> I also tried changing the kernel version of one of the AppVMs from
> 4.9.45-21 to 4.9.35-20 and 4.9.35-19 but nothing changed.
> 
> Does anyone have any tips or has experienced something similar?
> 
> 
> I'm using Qubes 3.2, kernel version 4.9.45-21 with i3 on a Lenovo X250.
> 
> 
> Best regards

To sum it up, I moved to the 4.9.45-21 kernel, and re-build some of my AppVM's 
from scratch, which in combination, for now at least, solved the 
speed/lag/freeze issues.

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