http://bugs.freedesktop.org/show_bug.cgi?id=26347
--- Comment #15 from Tobias Jakobi <liquid.a...@gmx.net> 2010-03-04 05:24:20 PST --- @Rafał Miłecki: Currently (nearly) everything in PM looks wrong to me. First of all the user has no way to configure the power management. I can't force the card into low-power mode like I can on Windows. Nor can I force the card into high-power mode if I need the performance e.g. for games (even on Windows there are situation where I don't want dynamic clock changes because I want a steady framerate). There is currently no way to tell the driver: I'm in this situation and I need that much performance. And that's (at least from my understanding) the main reason for the different "power states" the card offers. This problem extends to mobile systems. On these the driver has currently no knowledge about the battery/AC-adapter situation. If we want the driver to react to ACPI events (like AC unplug/plug events) (and I really think we SHOULD react to that) we need to expose power state selection to userspace. > Anyway, I don't think it's really important to understand Windows driver. We > may eventually need smarter reclocking algorithm. I think it very much is, because the Windows driver actually does reclocking right (no artifacts, no sudden gamespeed slowdowns when reclocking occurs) and offers the user the ability to configure the reclocking behaviour. I agree that we may need a smarter algorithm for WHEN to do reclocking, but we should adapt to the Windows driver for WHICH clock/voltage/etc. to select. The current PM implementation on linux does too much "automagic", which fails in most cases. It ignores the concept of "power states" in the sense that the term "power state" doesn't really matter to the driver - it switches between them anyway. -- Configure bugmail: http://bugs.freedesktop.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug. ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev -- _______________________________________________ Dri-devel mailing list Dri-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dri-devel
