Yes, I have customized xorg.conf via /etc/X11/xorg.conf.d/intel.conf :

Section "Device"
  Identifier "drm0"
  Driver "intel"
  Option "TearFree" "true"
EndSection

I checked /var/log/Xorg.0.log, "intel" driver works without errors.

Unfortunately I did not solve the problem modifying this configuration file.

P.S. The https://man.openbsd.org/intel page mentions "XV_SYNC_TO_VBLANK". Even if it might be solution, actually I m not sure I can set this attribute.

On 10-01-2020 20:58, Dumitru Moldovan wrote:
On Fri, Jan 10, 2020 at 10:18:51AM -0700, Stanislav wrote:
I have got weak flickering of XFCE too (after upgrade to 6.6).
Mentioned setting the method for vblank does not fix it. Turning on/off
compositor does not help too.
Any ideas?


Have you tried customizing xorg.conf? This /etc/X11/xorg.conf works for
me in 6.6 with the Radeon HD 4200 video chipset from my old desktop:

Section "Device"
   Identifier "drm0"
   Driver "radeon"
   Option "AccelMethod" "glamor"
   Option "DRI" "3"
   Option "TearFree" "On"
   Option "SWCursor" "true"
EndSection

Still getting a bit of glitches when resuming, but mostly just for the
current window (the terminal) and it's usually enough to change the
active "window" in tmux to get rid of it.  Rarely do I have to change
to console and back with CTRL-ALT-F1 and CTRL-ALT-F5.  Had more issues
with the older driver (and default settings), so I'm actually happy
with the upgrade in this regard.

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