This is more of a heads-up though if anyone has any thoughts I'd welcome them. I've had a Logitech keyboard (K320) that uses the USB receiver that is supposed to support up to 6 devices. I recently purchased a Logitech M570 wireless trackball. Pairing the devices is pretty simple; start with both devices switched off and turn one on at a time, pausing a few seconds between. Both devices worked on one receiver but periodically I'd have about 8 seconds where keystrokes didn't register but would be buffered and would eventually registered. I look at dmesg and saw this:
I saw apparmor and wondered if I had some sort of keystroke logger or other malware. I decided to start Windows and download Logitech's unifying utility. I paired keyboard & trackball to one receiver and restarted Ubuntu-gnome. The delay was better - perhaps one second instead of 8 but still present and the above dmesg entries were still present. I finally used 2 receivers, one for each device paired using the Windows/Logitech utility. It appears both pieces are working as intended and no questionable dmesg entries.
[11115.017631] PM: Finishing wakeup.
[11115.017632] Restarting tasks ... done.
[11115.381792] r8169 0000:02:00.0 eth0: link down
[11115.381801] r8169 0000:02:00.0 eth0: link down
[11115.381830] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[11117.041775] r8169 0000:02:00.0 eth0: link up
[11117.041796] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[12307.264248] type=1400 audit(1403950780.599:71): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="/usr/lib/cups/backend/cups-pdf" pid=11322 comm="apparmor_parser"
[12307.264257] type=1400 audit(1403950780.599:72): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="/usr/sbin/cupsd" pid=11322 comm="apparmor_parser"
[12307.264692] type=1400 audit(1403950780.599:73): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="/usr/sbin/cupsd" pid=11322 comm="apparmor_parser"
[13649.020375] nvidia 0000:01:00.0: irq 43 for MSI/MSI-X
[13652.163976] type=1400 audit(1403952125.727:74): apparmor="DENIED" operation="open" profile="/usr/lib/telepathy/mission-control-5" name="/etc/dconf/profile/gdm" pid=11954 comm="mission-control" requested_mask="r" denied_mask="r" fsuid=115 ouid=0
Any thoughts about what caused this except "works best with Windows"? It's possible that my motherboard is at issue. It's a Gigabyte MA785GM-US2H on which I've noticed some USB devices do not function 100% correctly. Anyone else using the Logitech Unifying receiver on Ubuntu with multiple peripherals attached to one receiver?