I'm not completely certain whether it's related to AMD GPU dri=
ver or not, but
it's rather strange issue that I can get stable reproduce for.
I'm running a Gentoo system with AMD Radeon RX 480, with git AMD GPU driver=
and
git version of mesa. When interacting with scrollable JTextAreas in Java Sw=
ing
application, I get a stably reproducible issue (100%). Since this affects
multiple java swing applications (e.g. eclipse), including the program I'm
developing at the time, I can attempt to put together a reproducer java app=
, if
that's needed.
For first 2-3 seconds, mouse cursor moves jittery, then it stops to move at=
all
and display keeps displaying same frozen state. Nothing appears to work,
including Ctrl+Alt+F1, etc. But despite machine looking completely locked u=
p,
in fact, it's not. I can ssh into it and issue reboot command. During that
time, display doesn't shows any signs of life until the moment when machine
reboots (but I can hear KDE shutdown sound).
This occurs only under JRE8, both icedtea and oracle variants. Under JRE7 i=
ssue
doesn't trigger. If memory serves, JRE8 brought improvements to
hardware-accelerated GUI rendering. This is especially strange, since Swing=
GUI
framework renders it's own GUI widgets.
Considering that even Ctrl+Alt+F1 doesn't work, I suppose problem happens on
kernel level, possibly in AMD GPU driver.