[arch-general] High lag in graphical applications

[Yurii Kolesnykov]

Hello Lukas, 

Firstly, could you provide output of the following command (requires mesa-demos): 

`glxinfo|grep Rendering`


На 17 вересня 2019 р. в 18:20:53, LuKaRo (lists at lrose.de) написав:
> Hello everyone,
>  
> I've got some serious lag in using graphical applications since Sunday. I was able to  
> narrow it down quite a bit, but I can't find a solution.
>  
> I'm using a ThinkPad P50s with Intel HD 520 and NVIDIA Quadro M500M graphics (but, AFAIK,  
> only the Intel Graphics are used) with X11 and i3. Since Sunday, when using applications  
> like thunar, xfce-terminal, firefox, thunderbird, ... every interaction (starting,  
> clicking a menu, a menu item, sometimes even hovering) caused the whole GUI to freeze  
> from ~5 secs to up to 30 secs (thunar seemed to be the worst, with folders opening in no less  
> than 30 secs). However, scrolling lists, webpages, typing text, using terminal applications...  
> worked with no lag.
>  
> I ran multiple system updates every day, ensuring that my system was up-to-date, nothing  
> helped.
>  
> I tried switching to KDE then, noticing that while the old applications still caused  
> the same lag, all KDE-Applications (KDE file manager etc.) worked with no lag. When switching  
> from X11 to Wayland with KDE (or replacing i3 with sway), even the old applications (thunar,  
> xfce-terminal, firefox, thunderbird, ...) work with nearly no lag. However, sometimes  
> GUI interactions in thunderbird or firefox still cause high lag. When using XFCE, though,  
> I couldn't find any noticeable lag.
>  
> I tried downgrading the following packages (in that order):
>  
> * mesa-vdpau (19.1.6-2 -> 19.1.5-1), lib32-mesa (19.1.6-1 -> 19.1.5-1), libva-mesa-driver  
> (19.1.6-2 -> 19.1.5-1)
> * gtk3 (1:3.24.11-1 -> 1:3.24.10-1)
> * qt5-base (5.13.1-2 -> 5.13.0-7), qt5-declarative (5.13.1-1 -> 5.13.0-1), qt5-graphicaleffects  
> (5.13.1-1 -> 5.13.0-1), qt5-imageformats (5.13.1-1 -> 5.13.0-1), qt5-location (5.13.1-1  
> -> 5.13.0-1), qt5-multimedia (5.13.1-1 -> 5.13.0-1), qt5-quickcontrols2 (5.13.1-1  
> -> 5.13.0-1), qt5-quickcontrols (5.13.1-1 -> 5.13.0-1), qt5-script (5.13.1-1 ->  
> 5.13.0-1), qt5-sensors (5.13.1-1 -> 5.13.0-1), qt5-speech (5.13.1-1 -> 5.13.0-1),  
> qt5-svg (5.13.1-1 -> 5.13.0-1), qt5-tools (5.13.1-1 -> 5.13.0-1), qt5-webchannel  
> (5.13.1-1 -> 5.13.0-1), qt5-webengine (5.13.1-2 -> 5.13.0-1), qt5-webkit (5.212.0alpha3-4  
> -> 5.212.0alpha3-3), qt5-x11extras (5.13.1-1 -> 5.13.0-1), qt5-xmlpatterns (5.13.1-1  
> -> 5.13.0-1)
> * nvidia-utils (435.21-1 -> 430.40-2), nvidia (435.21-4 -> 430.40-5)
> * linux-headers (5.2.14.arch2-1 -> 5.2.4.arch1-1), linux-hardened-headers (5.2.14.a-1  
> -> 5.2.8.a-1), linux-firmware (20190815.07b925b-1 -> 20190717.bf13a71-1), linux-hardened  
> (5.2.14.a-1 -> 5.2.8.a-1), linux (5.2.14.arch2-1 -> 5.2.4.arch1-1)
> * linux-firmware (20190717.bf13a71-1 -> 20190628.70e4394-1), linux (5.2.4.arch1-1  
> -> 5.1.16.arch1-1), linux-hardened (5.2.8.a-1 -> 5.1.16.a-1), linux-hardened-headers  
> (5.2.8.a-1 -> 5.1.16.a-1), linux-headers (5.2.4.arch1-1 -> 5.1.16.arch1-1)
> * mesa (19.1.6-2 -> 19.1.5-1)
>  
> And did a reboot after each step. However, none of them changed anything.
>  
> Any ideas? Why does switching from i3 to KDE or even XFCE resolve the issue (partially)?  
> Why does switching from X11 to Wayland do so as well? I'd like to continue using i3 without  
> lag.
>  
> Thanks in advance,
> Lukas
>  
>