Where are xfce4-volumed logs?

If you run:

xev

Then press the misbehaving button, does it make events?

Yes.

FocusOut event, serial 37, synthetic NO, window 0x4400001,
    mode NotifyGrab, detail NotifyAncestor

FocusIn event, serial 37, synthetic NO, window 0x4400001,
    mode NotifyUngrab, detail NotifyAncestor

KeymapNotify event, serial 37, synthetic NO, window 0x0,
    keys: 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
           0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

Yes.

FocusOut event, serial 37, synthetic NO, window 0x4400001,
    mode NotifyGrab, detail NotifyAncestor

FocusIn event, serial 37, synthetic NO, window 0x4400001,
    mode NotifyUngrab, detail NotifyAncestor

KeymapNotify event, serial 37, synthetic NO, window 0x0,
    keys: 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
           0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

OK so it's sending events, does it also change the volume?

No. https://bugs.launchpad.net/ubuntu/+source/xfce4-volumed/+bug/1683244

For completeness this is the xev output for volume down media key, which changes volume ok.

FocusOut event, serial 37, synthetic NO, window 0x4400001,
    mode NotifyGrab, detail NotifyAncestor

FocusIn event, serial 37, synthetic NO, window 0x4400001,
    mode NotifyUngrab, detail NotifyAncestor

KeymapNotify event, serial 37, synthetic NO, window 0x0,
    keys: 32 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
           0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

If you go into keyboard settings and find the volume modifiers, can you set the key to the button press?

Setting manager doesn't start anymore, but it did few hours ago. Trying to find the name of the binary in menu entry.

$ xfce4-settings-manager

** (xfce4-settings-manager:16343): WARNING **: Couldn't connect to accessibility bus: Failed to connect to socket /tmp/dbus-i9Niv6x4SG: Connection refused

(xfce4-settings-manager:16343): xfce4-settings-manager-CRITICAL **: Failed to connect to Xfconf daemon: Failed to connect to socket /run/user/1000/bus: Connection refused

What's going on?

There is no volume shortcuts assigned in Keyboard section of xfce4-settings-manager. Only applications shortcuts there.

After reboot up volume key started to work, but now it is again malfunctioning. So the question is still the same - where can I see if xfce4-volumed reported any problems?

It works now. I don't know what happened.

This question was expired because it remained in the 'Open' state without activity for the last 15 days.

Looks like there was a conflict between Chrome and Firefox. If I understand it correctly, if somebody is directly claim ALSA interface directly, then other programs, including the system applet for volume control, won't be able to change the volume.