Logitech presenter only working partially

[Michael Fiedler]

The Logitech R400 presenter's buttons for starting a presentation and toggling the screen to black does not work any more since at least Ubuntu 13.10 [1] (it had worked in a previous Ubuntu version I do not remember exactly and it still worked in Debian 7 Wheezy but also does not work any more in Debian 8 Jessie). The buttons for the next and previous slide still do.

  [1] https://forum.ubuntuusers.de/topic/probleme-mit-logitech-r400-presenter-unter-13-/

This presenter model has probably been one of the most widely spread ones since many years. I've bought mine in 2010 and it still is the best selling presenter on amazon.com and amazon.de. So really a lot of people are affected (moreover, similar Logitech models do exist, too).

The problem seems to be in file /lib/udev/hwdb.d/60-keyboard.hwdb – the "displaytoggle" and "presentation" entries do not seem to be mapped to a key correctly (I do not understand how that mapping works in more detail). As a workaround, the Logitech R400 entry in this file can be changed (see attached patch) followed by

    sudo udevadm hwdb --update

but it does not seem to be a real solution as other devices are probably affected, too. The real solution would probably be to get the "toggledisplay" etc. entries in this configuration file to be mapped correctly.

latest Ubuntu version tested: 15.10
udev package version: 225-1ubuntu9

[Ubuntu Foundations Team Bug Bot (crichton)]

The attachment "workaround for /lib/udev/hwdb.d/60-keyboard.hwdb" seems to be a patch. If it isn't, please remove the "patch" flag from the attachment, remove the "patch" tag, and if you are a member of the ~ubuntu-reviewers, unsubscribe the team.

[This is an automated message performed by a Launchpad user owned by ~brian-murray, for any issues please contact him.]

[Björn Daase (invisibleshadowghost)]

I tried exactly the solution above using Ubuntu 16.04, but it does not help. Does anybody have a clue?