The Watt's-Up udev rule is far too general and catches quite a few unrelated devices containing FTDI USB devices. This causes the user to get a perplexing "Device or resource busy" error when attempting to use their device. In particular, it appears the criterion currently used catches any FTDI device, Watt's Up rule: serial: A80????? vendor: 0403 product: 6001 Sparkfun FT232 breakout board: My own serial: A800el9N vendor: 0403 product: 6001 Parallax Propeller: See bug[1] serial: A8007b1Z vendor: 0403 product: 6001 This rule needs to be removed until a more selective criterion is identified. It's unacceptable to break a whole class of generic devices simply because a vendor doesn't include any usable identification in their device.
probably worth linking to the ubuntu bug https://bugs.launchpad.net/ubuntu/+source/devicekit-power/+bug/507247 it also cause problems for arduinos
upower should release the device if the identification string isn't received. Isn't this happening?
For completeness there's a Debian bug too: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=586751
I've pushed this: commit b0bbb29df1363e4c7c51564506b45b42bf71137c Author: Richard Hughes <richard@hughsie.com> Date: Mon Mar 14 11:01:12 2011 +0000 Add a config option 'EnableWattsUpPro' to disable the Watts Up Pro device Annoyingly, the device used in the Watts Up Pro device seems to be a generic USB->serial adaptor, which means it doesn't have a unique vendor and product ID. If we try to probe for the WUP device, we can actually upset other devices that are not expecing to be probed. This fixes #33846 although we actually still need to be more strict in detecting a true WUP device.
commit 6abd4123ef2808d1ff35fe7656922f314e68c9a8 Author: Bastien Nocera <hadess@hadess.net> Date: Sat Oct 12 14:55:30 2013 +0200 linux: Opt-out of checking Watts Up devices earlier Don't wait for tty events from udev if we're not going to use the Watts Up device anyway. Cuts down on the possible wakeups. commit d6bfaaf0aac5cac01d3abf9059703252286f4566 Author: Bastien Nocera <hadess@hadess.net> Date: Sat Oct 12 14:46:39 2013 +0200 etc: Disable Watts-Up devices by default They are few are far between, and users of the device can spare the time to enable this by default. https://bugs.freedesktop.org/show_bug.cgi?id=33846
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