3

I've just been monitoring my cpu usage in openoffice calc when cells have been copied vs when they haven't and seen a dramatic increase in cpu usage for the Xorg process. The additional rendering required is a box with scrolling dashed lines around the cells that have been copied. The issue stands regardless of whether the window is minimised. Obviously it takes /some/ cpu power to render, but to increase an i7 by a more or less constant 7% usage seems slightly overkill. If anything surely this should impact on the gpu?

Gilles 'SO- stop being evil'
  • 807,993
  • 194
  • 1,674
  • 2,175
James
  • 133
  • 3

1 Answers1

5

I've found that turning off "Anti-Aliasing" speeds up OpenOffice on my system. The setting is in Tools->Options, OpenOffice.org->View. You might also want to experiment with turning on and off Hardware Acceleration.

jsbillings
  • 24,006
  • 6
  • 56
  • 58
  • worked a treat - on my laptop (1.4 core2) it took cpu usage down from a constant 20% to 3% :D. Thankyou! – James Jan 19 '11 at 23:40
  • Ditto here. Running Debian Squeeze on Atom 1.6, 2 GB RAM, Nvidia ION running nvidia proprietary driver. LibreOffice 3.4.3 from backports.org. As soon as I selected 2 cells and the running ants appeared, the Xorg CPU load peaked to 100% which rendered the machine unusable. Hardware acceleration is turned on. When I turned *off* anti-aliasing, everything went back to normal. –  Nov 19 '11 at 20:08
  • I just wanted to add a comment to help SEO because I was trying to troubleshoot high xorg cpu usage on my ubuntu 16.04 install - and went down numerous paths before realising (to my surprise) that the marching ants was causing the problem - this worked perfectly. Before applying this fix, I noticed the process `/usr/lib/xorg/Xorg --core :0 -seat seat0 -auth /var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch` was using 30-40% cpu – waffl Mar 19 '18 at 22:09