Package: gnome-settings-daemon Version: 3.22.2-2+deb9u2 Severity: important
I've noticed that sometimes the sound volume starts decreasing spontaneously. Sometimes it happens when music is playing, sometimes it happens when no audio playback is in progress. The square-shaped popup showing the current sound level just appears over the desktop for a second and the bar moves a little bit to the left (decrease) and then it goes away. It keeps happening until the level drops all the way to 0 / muted. It even pops up sometimes when it is already completely muted. It only happens rarely, not every day, sometimes it happens intermittently for a period of 5 - 10 minutes and then doesn't happen again. I've only noticed this problem on one system. The system has a wireless remote control. I removed the USB dongle (wireless receiver) to eliminate the possibility that is related to the problem. There is also a USB headset (with microphone) with volume buttons that can activate the GNOME volume popup. I removed that too. They keyboard is a standard USB keyboard with no volume buttons. The system is an Intel NUC and the spec mentions an infrared sensor on the front. There is no active infrared transmitter in the room that I am aware of. The monitor has sound and has a different on-screen-display for audio volume, the volume controls for the monitor do not activate the sound controls in GNOME. Has anybody else observed bugs like this? Is there any way to determine which device is activating the volume settings? Is there any debugging that can be enabled to reveal what is doing this? Could the popup be improved to show which input device triggered the volume change? Regards, Daniel