On 03/06/2012 09:31 AM, Don Stewart wrote:
Does it happen with an out of the box xmonad ? With no user config?
Sorry to take so long to respond: I don't close X sessions lightly. But my home laptop's power brick futzed on me, so a reboot happened, like it or not. :) The short answer is "Yes". Long answer follows: I made another user and logged in with base xmonad as supplied by stock oneric ubunutu, made 20-mumble XTERMs on one screen and a top in the primary window. The machine was snappier to respond than my workstation at work, but the laptop is simply newer, too. (plus it was a brand new login, nothing else going on on the machine, etc. etc. etc.) But I could easily push the Xorg CPU to the 90% and above by simply moving my mouse across the windows, and when I did it vigorously, I could get seconds ahead of the focus updates. (i.e. stop moving the mouse and watch focus rattle between the XTERMs over and over again while it caught up). For giggles, I then started base stock CTWM, which was my favored platform before. I started ~40 one-character-wide XTERMs and lined them up next to each other and wiggled my mouse over them. Strictly speaking, there were probably something like twice the number of transitions there, because each xterm->xterm transition was really an xterm->root_window->xterm transition. Or maybe even xterm->border->root->border->xterm. I dunno. Anyway, wiggling my mouse over that field, I couldn't get my Xorg CPU above about 10%. - Allen S. Rout