Ok I tired of waiting maintainers to fix and found a bug and fixed it. Patch attached.
This bug caused by mount returns warning to STDERR when mounting read- only without -r flag. Example: $ sudo mount -o loop /home/xeron/Загрузки/trusty-desktop-amd64.iso /tmp/tmp1c7s4pag mount: блочное устройство /home/xeron/Загрузки/trusty-desktop-amd64.iso защищен от записи, монтируется только для чтения In english: $ LC_ALL=en_EN.UTF-8 sudo mount -o loop /home/xeron/Загрузки/trusty-desktop-amd64.iso /tmp/tmp1c7s4pag mount: block device /home/xeron/Загрузки/trusty-desktop-amd64.iso is write-protected, mounting read-only Possible bug duplicates (some are older, but I believe it's OK to mark them as duplicates if usb-creator will be fixed by patch provided in this ticket): Bug #1273739 Bug #1266731 Bug #1264400 Bug #1253065 Bug #1013511 (may be) Related bugs: Bug #1289310 (same encoding problems with LC_ALL set to C or en_EN.UTF-8 and national localized Download dir) Bug #948257 (not duplicate because it's about UI, but originally caused by same bug with ascii) ** Patch added: "usb-creator-fix.patch" https://bugs.launchpad.net/ubuntu/+source/usb-creator/+bug/1289314/+attachment/4031439/+files/usb-creator-fix.patch -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1289314 Title: 'Installation failed' error message To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/usb-creator/+bug/1289314/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
