Created attachment 110952 [details] [review] proof-of-concept patch to add TEST=power/control" to udev rules Per downstream report, https://bugzilla.redhat.com/show_bug.cgi?id=950205 libfprint udev rules try to set ATTR{power/control} without testing for existence first with TEST=="power/control".
ping?
another couple weeks, ping, feedback on patch please.
(In reply to Rex Dieter from comment #2) > another couple weeks, ping, feedback on patch please. Something tested would be better. None of the fingerprint readers I have have that problem. I'd also need to know why those devices don't have power control sysfs files.
When the kernel does not detect or have support for power control. FWIW, it the pattern that existing systemd (and many other) rules use, see 42-usb-hid-pm.rules.
commit 79d79c3c875d41379eae418157a8254e87641f85 Author: Rex Dieter <rdieter@math.unl.edu> Date: Wed Dec 17 07:27:15 2014 -0600 lib: Test before applying power saving udev rules add TEST=="power/control"... to test for the presence of the file before setting it. See https://bugzilla.redhat.com/show_bug.cgi?id=950205 https://bugs.freedesktop.org/show_bug.cgi?id=87414
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