Hey Martin, thank you for the report! Could you try if using directly the mkfs command is working? $ sudo mkfs.vfat -I -n label /dev/sdc
I guess you checked the journal for clues? The command you provided works fine on my hirsute system to format an usb key in vfat, I'm not sure if the type of device could make a difference there... ** Changed in: udisks2 (Ubuntu) Status: New => Incomplete ** Bug watch added: github.com/storaged-project/udisks/issues #851 https://github.com/storaged-project/udisks/issues/851 -- 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/1925822 Title: [21.04 regression] formatting vfat times out Status in udisks2 package in Ubuntu: Incomplete Bug description: There is a regression somewhere between udisks, udev, and dosfstools. Formatting a device with vfat hangs and fails: # blkid -p /dev/sda (nothing) # busctl call org.freedesktop.UDisks2 /org/freedesktop/UDisks2/block_devices/sda org.freedesktop.UDisks2.Block Format 'sa{sv}' vfat 0 (long pause) Call failed: Error synchronizing after formatting with type `vfat': Timed out waiting for object # blkid -p /dev/sda /dev/sda: PTUUID="3690494f" PTTYPE="dos" OTOH, formatting as ext4 works fine: # wipefs -a /dev/sda; wipefs -a /dev/sda # busctl call org.freedesktop.UDisks2 /org/freedesktop/UDisks2/block_devices/sda org.freedesktop.UDisks2.Block Format 'sa{sv}' ext4 0 (immediately succeeds) # blkid -p /dev/sda /dev/sda: UUID="8bea7475-6af5-4835-86d0-0e5b2cb5500e" VERSION="1.0" BLOCK_SIZE="4096" TYPE="ext4" USAGE="filesystem" I tested this to a QEMU emulated disk, but it reproduces equally well against a `modprobe scsi_debug` device. Package: udisks2 2.9.2-1 DistroRelease: Ubuntu 21.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/udisks2/+bug/1925822/+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