BUG: Temporary freezes with compositing enabled with 190.xx drivers

marcel83 · 10-18-09, 05:56 AM

Hi

I've been testing the 190.36 and 190.40 drivers lately. They work fine as long as no compositing is used, OpenGL apps work great, too, but as soon as I enable compositing (either KWin or Compiz) the display keeps locking up all the time, that is, it freezes for some time (1-10 seconds) then works for a few seconds before it freezes again. I don't have this problem with the 185.18.31 drivers.
Any idea what could cause this?

Thanks in advance.

conky · 10-18-09, 01:51 PM

Option "UseEvents" "true"

This is your problem. UseEvents is broken with the 190 drivers. Set this to false in your xorg.conf.

marcel83 · 10-19-09, 06:38 AM

Thanks, that solved the problem for now (well, actually it really just hides the actual problem but I can live with that).

Milena · 10-19-09, 10:36 AM

i got the same problem with kwin + compositing effects and any opengl related applications, especially wine games, x freezes occasionally for 1-5 seconds. thanks for the info about the "UseEvents" option, i was reading the readme and it says:

Enables the use of system events in some cases when the X driver is waiting for the hardware. The X driver can briefly spin through a tight loop when waiting for the hardware. With this option the X driver instead sets an event handler and waits for the hardware through the poll() system call.

does it cause any disadvantages i should be aware of ?

thanks in advance and best regards

marcel83 · 10-22-09, 09:24 AM

You might notice a slightly higher CPU load in some situations due to the busy waiting. Other than that there probably shouldn't be any disadvantages.

10-18-09, 01:51 PM	#2
conky Registered User Join Date: Nov 2007 Posts: 70	Re: BUG: Temporary freezes with compositing enabled with 190.xx drivers Option "UseEvents" "true" This is your problem. UseEvents is broken with the 190 drivers. Set this to false in your xorg.conf.

10-19-09, 06:38 AM	#3
marcel83 Registered User Join Date: Dec 2006 Posts: 11	Re: BUG: Temporary freezes with compositing enabled with 190.xx drivers Thanks, that solved the problem for now (well, actually it really just hides the actual problem but I can live with that).

10-19-09, 10:36 AM	#4
Milena Registered User Join Date: Mar 2009 Posts: 36	Re: BUG: Temporary freezes with compositing enabled with 190.xx drivers i got the same problem with kwin + compositing effects and any opengl related applications, especially wine games, x freezes occasionally for 1-5 seconds. thanks for the info about the "UseEvents" option, i was reading the readme and it says: Enables the use of system events in some cases when the X driver is waiting for the hardware. The X driver can briefly spin through a tight loop when waiting for the hardware. With this option the X driver instead sets an event handler and waits for the hardware through the poll() system call. does it cause any disadvantages i should be aware of ? thanks in advance and best regards

10-22-09, 09:24 AM	#5
marcel83 Registered User Join Date: Dec 2006 Posts: 11	Re: BUG: Temporary freezes with compositing enabled with 190.xx drivers You might notice a slightly higher CPU load in some situations due to the busy waiting. Other than that there probably shouldn't be any disadvantages.