On Thu, Apr 23, 2015 at 05:31:01PM -0700, Marc MERLIN wrote: > Hi Chris, thanks for the answer, > > On Thu, Apr 23, 2015 at 11:49:24PM +0100, Chris Wilson wrote: > > On Thu, Apr 23, 2015 at 03:22:44PM -0700, Marc MERLIN wrote: > > > I do boot my kernel with these options I found recommended to save > > > power, maybe I should remove some of them because they kill performance? > > > pcie_aspm=force i915.i915_enable_rc6=7 i915.i915_enable_fbc=1 i915.semaphores=1 i915.lvds_downclock=1 acpi_backlight=vendor > > > > Those options are broken. > > Ok, which ones specifically? :) > Without some of those, battery use from the driver has been bad in the past, > but I don't know which one does what exactly :) > > - pcie_aspm=force Probably saved your battery life, though the kernel should now be fixed. > - i915.i915_enable_rc6=7 Broken, unvalidated mode for your hardware. > - i915.i915_enable_fbc=1 Buggy. Can be very slow, causes GPU hangs and machine lockups. > - i915.semaphores=1 Default. > - i915.lvds_downclock=1 Subject to visual bugs. Setting (almost) any of the i915 options will taint your kernel (i.e. mark it as being in a known broken state). > > > Relevant bits form Xorg.log: > > > [ 49.114] (II) Loading /usr/lib/xorg/modules/drivers/intel_drv.so > > > [ 49.122] (II) Module intel: vendor="X.Org Foundation" > > > [ 49.122] compiled for 1.15.99.904, module version = 2.21.15 > > > > Start by grabbing an updated xf86-video-intel. > > On debian testing and unstable, it's the latest: > legolas:~# apt-get install xserver-xorg-video-intel/unstable > Reading package lists... Done > Building dependency tree > Reading state information... Done > xserver-xorg-video-intel is already the newest version. > Selected version '2:2.21.15-2+b2' (Debian:testing [amd64]) for 'xserver-xorg-video-intel' > > But now that you mention it, I just found this, so I'll try this out: > legolas:~# apt-get install xserver-xorg-video-intel/experimental > Reading package lists... Done > Building dependency tree > Reading state information... Done > Selected version '2:2.99.917-1~exp1' (Debian:experimental [amd64]) for 'xserver-xorg-video-intel' > > On top of being bleeding edge enoug not to be in debian unstable, does it have > performance enhancements that you are hopeful will help my situation? Lots. -Chris -- Chris Wilson, Intel Open Source Technology Centre _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
