Impact: Audio and Video artifacts while system is under load, such as with trackerd or updatedb.
Fix Description: The 8.04 scheduler algorithm selected for x86/x86_64 -generic is USER_SCHED. CGROUP_SCHED is much better at load leveling between process groups. The -server flavour has used CGROUP_SCHED from the beginning and has been shown to not have this issue.
TEST CASE: Start a test sound using gnome-sound-properties (System/Preferences/Sound, select Sound Events Test). As another user (root) run 'find / -type f | xargs grep foobar'. Audio clicks and pops can be heard in some cases.
SRU Justification:
Impact: Audio and Video artifacts while system is under load, such as with trackerd or updatedb.
Fix Description: The 8.04 scheduler algorithm selected for x86/x86_64 -generic is USER_SCHED. CGROUP_SCHED is much better at load leveling between process groups. The -server flavour has used CGROUP_SCHED from the beginning and has been shown to not have this issue.
Patch: http:// kernel. ubuntu. com/git? p=ubuntu/ ubuntu- hardy.git; a=commit; h=273f7b551a420 580307fa414fe61 6f0e276a4035
TEST CASE: Start a test sound using gnome-sound- properties (System/ Preferences/ Sound, select Sound Events Test). As another user (root) run 'find / -type f | xargs grep foobar'. Audio clicks and pops can be heard in some cases.