Java RE app still causes massive Xorg CPU hog

[DebbyIan]

https://bugs.launchpad.net/ubuntu/+sour ... bug/238629

I'm looking at this bug and it would seem that this issue is still present.
I have a Java app running but only Xorg CPU utilisation is way past 50%, almost 95% is some cases. The system isn't very responsive in this case. Notably the keyboard slows down. Go figure.

I'm not using any xorg.conf. The default xorg config sets the Intel driver to SNA. If I set this:

Code: Select all

Option "AccelMethod" "xaa"

The improvement is marginal but I can't be certain if the mode is being used.




Tried both Oracle and OpenJDK JREs.

[DebbyIan]

In fact removal of the xorg-intel driver (ie, resorting to kernel modesetting entirely) has had no effect or improvement either.

[DebbyIan]