On Thu, Jan 19, 2012 at 10:29:19AM +0100, Martin Steigerwald wrote: > > merkaba:~> cat /etc/modprobe.d/i915-kms.conf > options i915 modeset=1 i915_enable_rc6=1 i915_enable_fbc=1 semaphores=1 > > There is also > > # The Leading Cause Of The Recent Linux Kernel Power Problems > # http://www.phoronix.com/scan.php?page=article&item=linux_2638_aspm&num=2 > GRUB_CMDLINE_LINUX_DEFAULT="pcie_aspm=force threadirqs" > > but I didn´t found it to make much of a difference on my ThinkPad T520. same model here. Power consumption is fluctuate between 14 to 15W. With pcie_aspm=force, the reading appears lower by less than 1W, it could be an equipment error. So the difference is small, if any, with the pcie_aspm tweak. Besides, aspm seems remain disabled:
wei@Tungsten:~$ dmesg|grep -i aspm [ 0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-3.2.1 root=UUID=ed888aee-0822-4303-8bea-18f0fbf9ba3a ro quiet pcie_aspm=force threadirqs [ 0.000000] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-3.2.1 root=UUID=ed888aee-0822-4303-8bea-18f0fbf9ba3a ro quiet pcie_aspm=force threadirqs [ 0.000000] PCIe ASPM is forcibly enabled [ 0.460586] ACPI FADT declares the system doesn't support PCIe ASPM, so disable it [ 0.582432] ACPI _OSC control for PCIe not granted, disabling ASPM > > Aside from that glxgears is not, was not and likely never will be a > meaningful benchmark - it only utilizes a tiny fraction of OpenGL while > games and compositing managers use a different and larger set of OpenGL. > There are some benchmarks at Phoronix that show increased framerates. One > suggested explaination there is that due to the power savings mechanisms > like turbo boost for overclocking can be used more often and/or longer. > they are over several hundred MB. Is there any small and simple graphic test tool like glxgreas? -- Chen Wei -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/20120119115445.GA3141@Tungsten
