> 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 Desktop Packages, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/1393085 Title: Performance degraded and video glitches with i915 after upgrade to utopic Status in xserver-xorg-video-intel package in Ubuntu: Incomplete Bug description: After upgrading from trusty to utopic, I noticed a performance degradation in the video performance. In particular the flash plugin video (like youtube) starts OK but it degrades after a couple of seconds when in full screen, looking as if it was doing something like 10~15 fps with videos that worked fine before. When switching to windowed more again, the video goes more smoothly but the seek bar blinks and other parts of the video present some glitches. Also when switching from X to a console, via Ctrl-Alt-F1 for example, it takes like 2 seconds to get the console, and I see this message in the console: [ 184.436477] [drm:intel_enable_lvds] *ERROR* timed out waiting for panel to power on When switching back to X is fast as usual, but when switching back to the console, again 2 seconds delay and the message. Other weird looking messages are found in dmesg: [ 4.673834] [drm] GMBUS [i915 gmbus panel] timed out, falling back to bit banging on pin 3 [...] [ 4.732400] [drm] Wrong MCH_SSKPD value: 0x16040307 [ 4.732404] [drm] This can cause pipe underruns and display issues. [ 4.732406] [drm] Please upgrade your BIOS to fix this. Unfortunately there is no BIOS update for my notebook (Toshiba Z830). I've search for all those errors without any significant results. ProblemType: Bug DistroRelease: Ubuntu 14.10 Package: xorg 1:7.7+7ubuntu2 ProcVersionSignature: Ubuntu 3.16.0-25.33-generic 3.16.7 Uname: Linux 3.16.0-25-generic x86_64 .tmp.unity.support.test.0: ApportVersion: 2.14.7-0ubuntu8 Architecture: amd64 CompizPlugins: [core,composite,opengl,compiztoolbox,decor,vpswitch,snap,mousepoll,resize,place,move,wall,grid,regex,imgpng,session,gnomecompat,animation,fade,workarounds,scale,expo,ezoom] CompositorRunning: None CurrentDesktop: Unity Date: Sat Nov 15 22:52:27 2014 DistUpgraded: 2014-11-08 12:14:07,528 DEBUG enabling apt cron job DistroCodename: utopic DistroVariant: ubuntu DkmsStatus: virtualbox, 4.3.18, 3.16.0-25-generic, x86_64: installed ExtraDebuggingInterest: Yes GraphicsCard: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0116] (rev 09) (prog-if 00 [VGA controller]) Subsystem: Toshiba America Info Systems Device [1179:0009] InstallationDate: Installed on 2012-04-26 (933 days ago) InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425) MachineType: TOSHIBA SATELLITE Z830 ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-25-generic root=UUID=36929bf3-a158-44d9-a80d-3adac2840fa8 ro quiet splash acpi_backlight=vendor pcie_aspm=force i915.enable_rc6=7 i915.enable_fbc=1 i915.lvds_downclock=1 vt.handoff=7 SourcePackage: xorg Symptom: display UpgradeStatus: Upgraded to utopic on 2014-11-08 (7 days ago) dmi.bios.date: 04/18/2013 dmi.bios.vendor: TOSHIBA dmi.bios.version: Version 1.80 dmi.board.asset.tag: 0000000000 dmi.board.name: Portable PC dmi.board.vendor: TOSHIBA dmi.board.version: Version A0 dmi.chassis.asset.tag: 0000000000 dmi.chassis.type: 10 dmi.chassis.vendor: TOSHIBA dmi.chassis.version: Version 1.0 dmi.modalias: dmi:bvnTOSHIBA:bvrVersion1.80:bd04/18/2013:svnTOSHIBA:pnSATELLITEZ830:pvrPT22LE-00300GGR:rvnTOSHIBA:rnPortablePC:rvrVersionA0:cvnTOSHIBA:ct10:cvrVersion1.0: dmi.product.name: SATELLITE Z830 dmi.product.version: PT22LE-00300GGR dmi.sys.vendor: TOSHIBA version.compiz: compiz 1:0.9.12+14.10.20140918-0ubuntu1 version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.56-1 version.libgl1-mesa-dri: libgl1-mesa-dri 10.3.0-0ubuntu3 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 10.3.0-0ubuntu3 version.xserver-xorg-core: xserver-xorg-core 2:1.16.0-1ubuntu1 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.0-1ubuntu2 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.4.0-2ubuntu2 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.914-1~exp1ubuntu4.1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu2 xserver.bootTime: Sat Nov 15 22:40:14 2014 xserver.configfile: default xserver.errors: xserver.logfile: /var/log/Xorg.0.log xserver.outputs: xserver.version: 2:1.16.0-1ubuntu1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1393085/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
