For the record, this is not specific to Ubuntu or Ubuntu MATE at all -- I see this on Gentoo regularly, for example. It seems to be caused by a race condition in Caja and UDisks which didn't appear until UDisks started mounting volumes under user-specific subdirectories of `/media` -- so for example `user1` has volumes mounted under `/media/user1` and `user2` has volumes mounted under `/media/user2`. In ye olden days, `user1`'s UDisks-utilizing process (such as Caja) would mount the volume; `user2`'s instance of Caja would wait for the volume to get mounted by `user1`'s Caja, then open the shared mountpoint at `/media/[volume]`. Nowadays this doesn't work in any case, since `user1` puts in the request to mount the volume first and the volume is mounted under `user1`'s private mount directory -- `/media/user1/[volume]`. I'm not sure how to fix this yet, though. Maybe (but just a WAG) UDisks needs some kind of integration with the display manager or logind?
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to udisks2 in Ubuntu. https://bugs.launchpad.net/bugs/1930312 Title: USB disks and SD cards mount for wrong user Status in Ubuntu MATE: New Status in gvfs package in Ubuntu: Confirmed Status in udisks2 package in Ubuntu: Confirmed Bug description: I have MATE 20.04 LTS installed on a laptop with 4 users. Plugging in SD cards and USB sticks works perfectly, unless there is someone else logged in on the machine. eg: 1- user A logs in, then walks away and screen locks 2- user B switches to the login screen and logs in as user B 3- user B plugs in a USB stick, but it doesn't mount for user B 4- (hidden from sight) user A gets an "authentication is required to mount... /dev/sdb1" error and the window is asking for admin password - details of this are: polkit.subject-pid: 102318 polkit.caller-pid: 806 Action: org.freedesktop.udisks2.filesystem-mount-other-seat Vendor: The Udisks Project user B has no indication on why it didn't mount. If they click on the USB stick in the Caja side bar, they get an "Unable to mount USB Disk - an operation is already pending" So it seems that automount is trying to show the USB stick to the inactive user A, totally blocking user B. (user B doesn't even get the chance to enter an admin password to override) the only solution is basically to "switch account", log in as user A and log them out. (this clearly doesn't work if user B doesn't know their password!) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-mate/+bug/1930312/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
