When running with the iris driver, which is default on 15.4, I see crashes when
trying to open a module from the KDE system settings panel.

Additionally X appears to hang in a mouse and keyboard grab or so when putting
LibreOffice Impress into presentation mode. The only way I found out of that
was killing Impress.

Both problems are gone when I force the Intel driver to use i965 instead of
iris through ~/.drirc.

$ inxi -aG -y 80
Graphics:
  Device-1: Intel Skylake GT2 [HD Graphics 520] vendor: Dell driver: i915
  v: kernel bus-ID: 00:02.0 chip-ID: 8086:1916 class-ID: 0300
  Device-2: Sunplus Innovation Integrated_Webcam_HD type: USB driver: uvcvideo
  bus-ID: 1-5:2 chip-ID: 1bcf:2b96 class-ID: 0e02
  Device-3: Microsoft LifeCam VX-2000 type: USB driver: snd-usb-audio,uvcvideo
  bus-ID: 3-1.3:4 chip-ID: 045e:0761 class-ID: 0102
  Display: x11 server: X.Org 1.20.3 compositor: kwin_x11 driver: loaded: intel
  unloaded: fbdev,modesetting,vesa display-ID: :0 screens: 1
  Screen-1: 0 s-res: 3600x1200 s-dpi: 96 s-size: 951x317mm (37.4x12.5")
  s-diag: 1002mm (39.5")
  Monitor-1: DP2-1 res: 1680x1050 hz: 60 dpi: 91 size: 470x300mm (18.5x11.8")
  diag: 558mm (22")
  Monitor-2: HDMI1 res: 1920x1200 hz: 60 dpi: 94 size: 520x320mm (20.5x12.6")
  diag: 611mm (24")
  OpenGL: renderer: Mesa DRI Intel HD Graphics 520 (SKL GT2)
  v: 4.6 Mesa 21.2.4 compat-v: 3.0 direct render: Yes