> luca, if you remove the non-default kernel parameters does this change > anything: > acpi_backlight=vendor pcie_aspm=force i915.enable_rc6=7 i915.enable_fbc=1 > i915.lvds_downclock=1
Yes, it just makes it slower (although more consistently slow). Without those kernel options, after a reboot, it takes around 8 ~ 10 minutes to start being slow, with them the slowness is immediate. > As well, could you please comment to why these are in use? Hard to remember but fortunately I had some comments in my /etc/default/grub :) pcie_aspm=force https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Power_Management_Guide/ASPM.html (forced aspm because it not automatically detected) i915.* http://www.phoronix.com/scan.php?page=article&item=intel_i915_power&num=1 modinfo: i915_enable_rc6:Enable power-saving render C-state 6. Different stages can be selected via bitmask values (0 = disable; 1 = enable rc6; 2 = enable deep rc6; 4 = enable deepest rc6). For example, 3 would enable rc6 and deep rc6, and 7 would enable everything. default: -1 (use per-chip default) (int) (I enabled everything because it seemed to work well) acpi_osi=Linux / acpi_backlight=vendor http://www.linlap.com/toshiba_portege_z830-10f (acpi_osi=Linux not used because it doesn't seem necessary with the hack mentioned in https://bugs.launchpad.net/ubuntu/+source/linux/+bug/935778/comments/68) I used to have issues in the past with the backlight after suspending, but I got everything working fine using those options for a couple of Ubuntu releases, until utopic :( Thanks! PS: I also tried switching to UXA acceleration method, but is not making a difference. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1393085 Title: Performance degraded and video glitches with i915 after upgrade to utopic To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1393085/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
