KDE/Debugging

Some loose, partially undocumented, but useful debugging methods found here and there in discussions, bug comments etc.

KDE5? (F24)

kwin_x11

https://community.kde.org/KWin/Debugging

export KWIN_USE_INTEL_SWAP_EVENT=0 # only affects intel IGPs 
export KWIN_EXPLICIT_SYNC=0 # most likely candidate on nvidia GPUs 
export KWIN_USE_BUFFER_AGE=0 # well, you tried, but hey ... ;-) 

kwin_x11 --replace &

gam_server

Sending a SIGUSR2 to running gam_server makes it dump its debugging information into /tmp/gamin_debug_*

kill -s SIGUSER $(pidof gam_server)

DBUS

DBUS can be followed using dbus-monitor, it can be lousy thou and hard to follow. Wireshark has dissector for dbus these days but it doesn't do that good job on it.

dbus-monitor

.xsession-errors

Users $HOME/.xsession-errors

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