Ubuntu
mesa package

  1. Bug #1222602
  2. Comment #77

Comment 77 for bug 1222602

Revision history for this message
Stefan Thielscher (stth) wrote :

Okay, I did a few more tests...

- the external monitor is connected at boot time, I disconnected it when the login screen is displayed, logged in, no high cpu usage

- logged out, connected the monitor, logged in, HIGH CPU USAGE

- logged out, disconnected the monitor, logged in, no high cpu usage

So, up to and including LightDM's login screen, everything is fine. (The date/time indicator on the login screen pops up the calender immediately for example; when I'm logged into Unity with high cpu usage, the calender only pops up in super slow motion.)

When I log into Unity and the external monitor is connected at the time, I get high cpu usage. When I log into Unity with the monitor disconnected, I do not get high cpu usage. When I connect the monitor once Unity is up, everything works fine, too.

BTW, I also have KDE Plasma Workspaces installed, and I don't see any signs of high cpu usage or graphical slowdowns when I log into that one, even when the external monitor is connected the whole time.