On Tue, 4 Apr 2000, Roman Weissgaerber wrote:
> You disconnect all devices and reset the USB-subsystem.
> This is like a shutdown of a computer at a suspend and a
> boot at a resume.
I haven't tested the patch yet but I'd vote for the 'always root
for the worst case' approach because it might happen. There's no
telling to what f*cked up state broken HW/BIOSes leave the hardware at
resume.
Just look at my Toshiba laptop:
o usb-ohci: oops, doesn't work at all
o ad1848/sb: no sound, interrupts are not generated
o ide-cd: door locking status lost
o ctfb: need to reinitialize some registers
All of these need PM support in the driver to work expectedly after
resume. If just one laptop has this wide variety of problems (with varying
degrees of severity) then the `union' of these problem cases for all the
different configurations is such that you should reinitialize everything
completely at resume (ok, not forgetting what's sane and not).
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