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It is not udev's task to apply any of these setting that way, or
from udev rules files. Things need to be sortet out in the kernel,
or explicit whitelist can possibly be added to the hardware database.
Until that is sorted out, and general agreement, udev is not
willing to maintain any such lists or power management settings
in general.
"Thanks for digging this out! I thought my Kinesis keyboard got broken
and ordered a new one, only to find out that the new one doesn't work
as well. I'm not sure whether we should start collecting a blacklist
of keyboards which don't work with USB autosuspend, or rather a
whitelist? Or revert this wholesale?"
https://github.com/systemd/systemd/issues/340
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We only care about whether our direct parent is removable, not whether any
further points up the tree are - the kernel will take care of policy for
those itself. This enables autosuspend on devices where the root hub reports
that its removable state is unknown.
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The Avocent KVM over IP devices doesn't work correctly with USB power
management enabled.
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Update comment to be a bit more specific.
Change match to blacklist the serial number of the broken devices
instead of whitelisting the serial number of the fixed devices.
This allows to do something useful with the serial number in the
future.
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On Thu, Dec 6, 2012 at 9:20 AM, Robert Milasan <rmilasan@suse.com> wrote:
> It seems that the added rules:
>
> ACTION=="add", SUBSYSTEM=="usb", ATTR{idVendor}=="046b",
> ATTR{idProduct}=="ff10", TEST=="power/control",
> ATTR{power/control}="auto"
>
> creates problems for people with Supermicro X8ST3 mb (and maybe
> other Supermicro mb's) and renders the KVM-over-IP unusable, at BIOS
> and GRUB the KVM works perfectly, but after that the device is unusable.
>
> Dropping the rule fixes the issue.
>
> Reference bug: https://bugzilla.novell.com/show_bug.cgi?id=792576
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HP iLO fw versions below 1.50 incorrectly report that HP iLO virtual
Kbd/Mouse supports remote wakeup. With the rules change in commit
3bfc7a97b1824fcdfb738617d9a5450a20a22a0f, the HP iLO was listed for
power control.
In iLO fw versions less than 1.50, the iLO Kbd/Mouse become unresponsive
once they are suspended. HP iLO fw versions 1.50+ correctly report that
they don't support remote wakeup, which makes the rules moot in any case.
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<arjan> can you open the 42-usb-hid-pm.rules file
<arjan> and go to line 46
<arjan> and tell me why ATTR{idProduct}="0002" only has one = and not two (e.g. == ) ?
<kay> arjan: yep
<kay> arjan: bug
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Some USB ports on external hubs may be reported as "fixed". We only want
to auto-enable this on ports that are internal to the machine, so check
the parent state as well.
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