Created attachment 111414 [details] Screenshot of (Dolphin) mount error. Following a recent update of udisk2 from 2.6.5 to 2.7.6 Dolphin, for example, is unable to mount media. This happens when attempting to mount any device, external USB, internal (unmounted) drive, no matter what. The error reported by Dolphin is: "An error occurred while accessing 'Wastebin'; the system responded: The device is already mounted: Device /dev/sd(Xn) is already mounted at '/run/media/(user)/(device label)'." (See attached Screenshot) Downgrading udisks2 back to 2.6.5 "cures" the problem, media mounts correctly without error. See also this https://forums.opensuse.org/showthread.php/530169-Since-TW-snapshot-20180312-Dolphin-throws-a-wobbly-when-attempting-to-mount-media thread on the openSUSE user forums. Using: Plasma 5.12.3 Frameworks 5.43.0 Qt 5.10.0
Follow up: Just found these, the first looks very similar to the problem I observed. https://bugs.kde.org/show_bug.cgi?id=391290 The second may also be related. https://bugs.kde.org/show_bug.cgi?id=391386 I temporarily reverted back to udisks2 2.7.6 and indeed the media is actually mounted, despite the warning. Open Dolphin Insert USB stick Click to mount - error displayed Click elsewhere on a "Places" entry (Home, Downloads, whatever) Re-Click on the USB device - now shown as mounted and Dolphin displays the contents.
*** This bug has been marked as a duplicate of bug 391386 ***