Messages in this thread | | | Date | Wed, 7 Oct 2009 23:44:35 -0400 | Subject | Re: [resend] i915: high power consumption after suspend/resume | From | Andrew Lutomirski <> |
| |
On Mon, Oct 5, 2009 at 12:21 PM, Jesse Barnes <jbarnes@virtuousgeek.org> wrote: > On Sat, 3 Oct 2009 12:50:01 -0400 > Andrew Lutomirski <luto@mit.edu> wrote: > >> [resend b/c the intel-gfx list doesn't allow non-member posting] >> >> Hi- >> >> First, thanks for all the great work on i915's power saving features >> -- power consumption on my laptop (Lenovo X200s) is now almost as low >> on Linux as on Windows. >> >> After a suspend/resume cycle, though, my power consumption usually >> goes up by over a watt. I think this is due to i915, because of an >> experiment I did: >> >> 1. Boot with modesetting off into single user mode. >> 2. Suspend and resume >> 3. Reload i915 with modesetting on. Power consumption is low. >> 4. Suspend and resume. Power consumption is high. >> 5. Unbind and rebind i915. Power consumption is high. >> 6. Suspend. System hangs (seperate bug, I guess). >> >> I get similar results if I boot single user with modesetting on: power >> consumption is low, becomes high after suspend/resume, and goes low >> again after rebinding i915. >> >> This is on 2.6.32-rc1 + a little (i.e. 84d88d5d4e from Linus' tree >> plus an ext4 fix). I'm having trouble reproducing any of this on >> 2.6.31. > > I probably need to save/restore some more of the power saving state > across suspend/resume... Can you file a bug for this at > bugs.freedesktop.org so it doesn't get lost?
Submitted as https://bugs.freedesktop.org/show_bug.cgi?id=24386
Thanks, Andy -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |