Boyd Stephen Smith Jr. wrote: > On Monday 2009 January 05 06:28:31 Emanoil Kotsev wrote: >> USB is powered when you attach the device. This means the usb device gets >> power over the bus after attaching it. I've read about power on/off with >> specific usb disks and devices. You may google about it. > > That's not the whole story though. According to the specification, power > over USB is limited to 100mA until the both sides (host and device) > negotiate, as > which point it is limited to 500mA. Unfortunately, some implementations > have ignored this, and assume the other side will as well, expecting 500mA > at all times.
I never came that far. I assume you are right, because it makes sense. > > Linux is compliant with the specification. Not *just* because "it's the > standard" but because providing 500mA *could* physically damage devices > that > aren't expecting it. Unfortunately, this can cause problems with (but not > damage to) non-compliant devices when they only get 20% of the power they > are expecting. > Hm, don't know, may be. About your issue I can assume that your decise is not recognised correctly Bus 001 Device 002: ID 13ba:0017 Unknown PS/2 Keyboard+Mouse Adapter have a look here - it seems releated https://bugzilla.redhat.com/show_bug.cgi?id=463391 Comment #7 From Tim "Taiwanese" Liim 2008-09-24 21:34:55 EDT ------- Please reassign, now that we know the offending module is xorg-x11-server-Xorg-1.5.0-1.fc9.i386. ------- Comment #8 From Peter Hutterer 2008-09-26 00:45:24 EDT ------- Tim, can you cross-check with Bug 456936 please. This issue should be fixed with xorg-x11-server-Xorg-1.5.0-2.fc9 ------- Comment #9 From Tim "Taiwanese" Liim 2008-09-26 01:07:39 EDT ------- Thanks, Peter. That worked fine for me. Indeed my PS2->USB converter has both keyboard and mouse on it, thus fits description of bug 456936. I'll mark this bug as duplicate. *** This bug has been marked as a duplicate of 456936 *** regards -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
