(In reply to comment #50) > I played a bit with power_profile settings and it turns our that whenever > profile is set to high, mid, sound stuttering is pronounced. Yet, once set to > low, stuttering is gone (or unnoticeable). > If anyone wants to try (adjust path to suit your hardware): > echo low > /sys/class/drm/card0/device/power_profile > Then the actual frequency can be verified by: > cat /sys/kernel/debug/dri/0/radeon_pm_info
Confirming this on ATI X1400 mobile, Ubuntu 11.04 x86. When using the "low" power profile, audio stuttering/crackling is much less prevalent (or maybe not even noticable) in Youtube fullscreen vids. Using the "high" setting results in definite audio crackling when switching to fullscreen. This is with the very latest Flashplayer 11 beta for Linux released today. On my card, low setting results in: # cat /sys/kernel/debug/dri/0/radeon_pm_info default engine clock: 392000 kHz current engine clock: 128250 kHz default memory clock: 350000 kHz current memory clock: 135000 kHz PCIE lanes: 1 High setting gives: # cat /sys/kernel/debug/dri/0/radeon_pm_info default engine clock: 392000 kHz current engine clock: 391500 kHz default memory clock: 350000 kHz current memory clock: 342000 kHz PCIE lanes: 0 There's a difference not only in board frequencies, but also the PCIE lanes number (0 means full throttle, or is "more performant" than 1 I guess ??). -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/564376 Title: Lucid - radeon kms causes iwl3945 to drop connection on youtube but not with mainline To manage notifications about this bug go to: https://bugs.launchpad.net/xserver-xorg-driver-ati/+bug/564376/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
