On Thu, May 13, 2021 at 09:12:01AM +0200, Philipp Marek wrote: > > > > If that's the case, trying a different window manager (xfce4 for > > > > instance) > > > > would show if the window manager is the appropriate place to go. > > > > > > Sorry.... I'm running LXQT, which uses xfce4 by default: > > > > > > 1755 ? Sl 0:00 \_ > > > /usr/lib/x86_64-linux-gnu/xfce4/xfconf/xfconfd > > > > Those are utilities -- but the window manager defaults to openbox. > > Here's a slice from the output of pstree showing that: > > Ah yeah, right, sorry. > > $ wmctrl -m > Name: Xfwm4 > Class: xfwm4 > PID: 1728 > Window manager's "showing the desktop" mode: N/A > > apt tells me > > xfwm4 - window manager of the Xfce project > > and > > $ ps fax | grep openbox > 389565 pts/15 S+ 0:00 | \_ grep openbox > $ > > so it looks like the window manager is not at fault. > > If I "ssh -X <other-user>@localhost xterm", so that my personal > ~/.Xresources > don't apply, I can reproduce the blinking pixels; with "xpra" I still don't > have the right or bottom borders, but the blinking pixels do not appear. > > 390309 ? RLl 0:04 /usr/bin/python3 /usr/bin/xpra start --ssh=ssh > -l ard --start=xterm > 390310 ? Sl 0:01 \_ Xvfb-for-Xpra-S390306 +extension GLX > +extension Composite -scre > 390452 ? S 0:00 \_ xterm > 390511 pts/20 Ss 0:00 \_ sh > 390519 pts/20 R+ 0:00 \_ ps fax > > xpra says "Client OpenGL: disabled", "window rendering: GTK3: Cairo (1)". > > glxinfo says (abbreviated): > > name of display: :0 > display: :0 screen: 0 > direct rendering: Yes > server glx vendor string: SGI > server glx version string: 1.4 > server glx extensions: > ... > client glx vendor string: Mesa Project and SGI > client glx version string: 1.4 > client glx extensions: > ... > GLX version: 1.4 > GLX extensions: > ... > Extended renderer info (GLX_MESA_query_renderer): > Vendor: Intel (0x8086) > Device: Mesa Intel(R) UHD Graphics 620 (KBL GT2) (0x5917) > Version: 20.3.4 > Accelerated: yes > Video memory: 3072MB > Unified memory: yes > Preferred profile: core (0x1) > Max core profile version: 4.6 > Max compat profile version: 4.6 > Max GLES1 profile version: 1.1 > Max GLES[23] profile version: 3.2 > OpenGL vendor string: Intel > OpenGL renderer string: Mesa Intel(R) UHD Graphics 620 (KBL GT2) > OpenGL core profile version string: 4.6 (Core Profile) Mesa 20.3.4 > OpenGL core profile shading language version string: 4.60 > OpenGL core profile context flags: (none) > OpenGL core profile profile mask: core profile > OpenGL core profile extensions: > ... > OpenGL version string: 4.6 (Compatibility Profile) Mesa 20.3.4 > OpenGL shading language version string: 4.60 > OpenGL context flags: (none) > OpenGL profile mask: compatibility profile > OpenGL extensions: > ... > OpenGL ES profile version string: OpenGL ES 3.2 Mesa 20.3.4 > OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.20 > OpenGL ES profile extensions: > ... > 122 GLX Visuals > ... > > > Can I disable OpenGL for a single application or a single window, perhaps? I expect that the answer is "no". (this is in the area of "X server", though admittedly "add-ons"). -- Thomas E. Dickey <dickey@invisible-island.net> https://invisible-island.net ftp://ftp.invisible-island.net
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