Looking at the description of above macros at ./include/drm/drmP.h the logging is active only when drm.debug kernel option is set. Indeed I found this option in my /etc/default/grub file:
GRUB_CMDLINE_LINUX_DEFAULT="plymouth:debug splash quiet drm.debug=0xe" It seems the option is not default in recent Ubuntu release (at least 14.04), becouse restoring content of the file to default makes the line look like this: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" How the drm.debug option did get to the configuration file I don't know. Maybe this is remainder from prevoius Ubuntu release ant stayed after upgrade ? Thus there is no need to recompile kernel modules, just remove the drm.debug kernel option from /etc/grub/default and regenerate grub configuration with update-grub. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1326567 Title: [Asus M4A88T-M] problem with drm:drm_mode_addfb and drm:radeon_crtc_page_flip To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1326567/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs