I made the following change in /lib/udev/rules.d/70-hid2hci.rules and
now it works.
KERNEL=="hidraw*", ATTRS{idVendor}=="046d",
ATTRS{idProduct}=="c70[4abc]|c71[34bc]", \
changed to:
KERNEL=="hiddev*|hidraw*", ATTRS{idVendor}=="046d",
ATTRS{idProduct}=="c70[4abc]|c71[34bc]", \
I don't understand this, because it seems from the `udevadm monitor`
output that my adapter (c70[bc]) really was a hidraw device. However,
the results speak for themselves and this change has fixed the problem
for me, while maintaining a fairly tight KERNEL condition. I suspect
that if other people's Logitech USB Bluetooth dongles are still not
working with this patch, then they may want to make a similar change to
the previous line in 70-hid2hci.rules, but I am not touching that for
now, because it does not affect me.
I remember a while ago, there was only one Logitech rule, and it used
the | (or) operator for the KERNEL condition, just like my fix does.
Does anyone know why they were separated into different rules? Because,
obviously, they were under-matching by doing so.
I have attached a proper diff patch for those who are interested.
** Patch added: "fix to udev hid2hci rules for Logitech USB Bluetooth dongles"
https://bugs.launchpad.net/ubuntu/+source/udev/+bug/658471/+attachment/1685188/+files/__lib__udev__rules.d__70-hid2hci.rules.diff
** Changed in: udev (Ubuntu)
Status: New => In Progress
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udev fails to call hid2hci for Logitech USB Bluetooth adapter
https://bugs.launchpad.net/bugs/658471
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