On Thu, Sep 25, 2014 at 11:28 AM, Grant Edwards <grant.b.edwa...@gmail.com> wrote: > On 2014-09-25, Mike Gilbert <flop...@gentoo.org> wrote: >> On Wed, Sep 24, 2014 at 6:28 PM, Grant Edwards >><grant.b.edwa...@gmail.com> wrote: >>> On 2014-09-24, Neil Bothwick <n...@digimed.co.uk> wrote: >>>> On Wed, 24 Sep 2014 19:42:56 +0000 (UTC), Grant Edwards wrote: >>>> >>>>> After an update yesterday, I've noticed that the group assigned to >>>>> ttyUSB devices has changed from uucp to root. Non-USB serial ports >>>>> still seem to be uucp. >>>> >>>> What did you update? They are still root:uucp here. >>> >>> Several things got updated, but the most likely suspect is probably >>> sys-fs/udev-215-r1 => sys-fs/udev-216. But, I don't see any changes >>> in the default rules to account for the change in behavior. >>> >> >> I'm running systemd-216, and I see this in >> /lib/udev/rules.d/50-udev-default.rules: >> >> KERNEL=="tty[A-Z]*[0-9]|pppox[0-9]*|ircomm[0-9]*|noz[0-9]*|rfcomm[0-9]*", >> GROUP="uucp" >> >> I suppose it is possible that some later rule overrides it, but I >> don't see anything obvious. > > Yes, I saw that rule (and it hasn't changed recently). I also have a > rule that creates a symlink for a certain USB-serial adapter in > /etc/udev/rules.d/99-user.rules: > > SUBSYSTEMS=="usb",\ > ATTRS{product}=="FT232R USB UART",\ > ATTRS{serial}=="AH026Q3X",\ > KERNEL=="ttyUSB*",\ > SYMLINK+="ttyDBG",\ > GROUP="uucp" > > I didn't used to need to set the GROUP in that rule, the device file > just defaulted to having a group of uucp. Yesterday, I had to add the > "GROUP" command to get the behavior I always used to get without it.
You could try using udevadm test to see what rules are firing. sudo udevadm test --action=add /sys/class/tty/ttyUSB0