http://bugzilla.opensuse.org/show_bug.cgi?id=1124909
http://bugzilla.opensuse.org/show_bug.cgi?id=1124909#c7
--- Comment #7 from Rafał Miłecki ---
I decided to verify if that is a user space issue.
I've edited 5.0.0-rc6 sources file:
drivers/base/power/sysfs.c
and modified control_store() by adding:
dev_info(dev, "%s: buf:%s\n", __func__, buf);
Booting that self compiled kernel and connecting the scanner gave me:
[ 192.719781] usb 1-2: new full-speed USB device number 5 using xhci_hcd
[ 192.979459] usb 1-2: New USB device found, idVendor=06bd, idProduct=0001,
bcdDevice= 2.00
[ 192.979465] usb 1-2: New USB device strings: Mfr=1, Product=2,
SerialNumber=0
[ 192.979468] usb 1-2: Product: SNAPSCAN 1212U
[ 192.979471] usb 1-2: Manufacturer: AGFA
[ 193.035936] usb 1-2: control_store: buf:on
[ 193.581453] usb 1-2: control_store: buf:auto
So there is clearly *something* in the user space that sets power/control to
the "auto" value essentially overwriting udev's workaround (the "on" value).
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