Thanks for the info! It seems that USB hard disks not in use (though mounted) won't cause the problem, it's only about HID devices as you mentioned. So I am using PS/2 adapters for keyboard and mouse now (funny thing: IBM usb mice won't work with those adapters, Logitech mice do - although both mice turn their lasers on and seem to be working...). Another issue I found while trying to get the CPU use C3: AMD/ATIs fglrx driver has a strange bug: While X is running the driver causes as many wakeups per second as the current screen refresh rate and the CPU will never enter C3. When switching to a virtual console and back into X, the driver won't cause that many interrupts anymore and the CPU suddenly uses C3 state... So everytime I start my computer I switch to a virtual console and back into X to work around that bug. Should I report this issue to AMD? Where should I report it?
About USB-HID-autosuspend: It would be great if someone would care about this, but how could a usb mouse, which needs to be polled to get information about movement, be ever suspended? I'm not a developer and I don't know much about USB, but that seems like a bit of a problem to me... Peter On Sun, 2007-05-20 at 21:37 -0700, Arjan van de Ven wrote: > Peter Ganzhorn wrote: > > After searching for possible causes for my problem I identified USB to > > be the problem - disconnecting all USB devices from my system will make > > the CPU enter C3 state a lot, about 50% with more than 20ms are reported > > by powertop. > > Unfortunately I have a usb mouse, usb keyboard und two external usb hard > > drives - and I don't want to miss any of them. Using USB-to-PS2 adapters > > may be an imperfect solution for mouse and keyboard, but the hard drives > > will remain an issue for sure. > > Is there any possible way to make the system to go to C3 with USB > > devices attached??? > > On Google I read that Microsoft released a hot-fix for Windows which is > > said to fix this issue, so I hope there is a way to do this with Linux > > as well. > > > > as far as I know, Linux unfortunately does not support this feature > (HID auto suspend) yet... I hope people are working on it; if not I > might end up spending some time (or time of people working in my group > ;) on it... _______________________________________________ Power mailing list [email protected] http://www.bughost.org/mailman/listinfo/power
