Flashing taskbar on Raspberry Pi?

Recently I encountered an issue with the Raspberry Pi where the taskbar kept flashing on and off, perhaps once every second or so.

After much digging around on 'tinterweb', I found that the solution was to remove the following entry for alsa in the following file:

~/.config/lxpanel/LXDE-pi/panels/panel

Removed the entry:

Plugin {
type=volumealsa
Config {
}
}

Saved the file, rebooted the Pi (I don't think the reboot is essential though) and all now works perfectly! Hope this helps you.

UPDATE:

I recently encountered a very similar issue on my rather ancient original Raspberry Pi (512Mb mem/single core) and the above recommendations failed to work. In the end, I had to edit the /boot/config.txt file and add the following entry:

dtparam=audio=on