Ubuntu
linux package

  1. Bug #1326567
  2. Comment #9

Comment 9 for bug 1326567

Revision history for this message
Radoslaw (radraw) wrote :

Thanks Christopher but I think my problem is pretty the same as in this bug report. Looking at the source code provided with Ubuntu 14.04 distribution it seems the reason is just some debug logging switched on in the kernel file:

linux-source-3.13.0/drivers/gpu/drm/radeon/radeon_display.c

There is radeon_crtc_page_flip function that contains:

 DRM_DEBUG_DRIVER("flip-ioctl() cur_fbo = %p, cur_bbo = %p\n",
    work->old_rbo, rbo);

The command is called unconditionally. Solution seems to be simply removing or commenting out above line.