Ubuntu
mesa package

  1. Bug #262605
  2. Comment #9

Comment 9 for bug 262605

Revision history for this message
David Tomaschik (matir) wrote :

A bit more information:

I performed an strace as well and got the same results as Chris does above. I took the IOCTL code and decoded it according to the documentation in the Linux Kernel. Based on that, it decodes to a Read/Write IOCTL in driver 'd', function 3A. Driver 'd' is assigned (primarily) to the drm driver. The drm driver uses function 3A for DRM_IOCTL_WAIT_VBLANK. Unfortunately, that's about where my understanding died.

I'm trying to figure out where it's called in the X code, but I'm not sure where to track it down. Maybe, however, this will help someone else figure it out. :)