Hi, the first message about lack of permissions is common and should be harmless. The failure happens possibly with the attempt to get 16 MiB of memory via call mmap(2). But it is not obvious why this only succeeds if you are superuser. So this might too be a red herring and the actual reason for wodim to abort is something that is not reported.
The last messages about "HUP" probably say that wodim closed the pipes by which it was connected to Brasero. Not necessarily the reason but rather a consequence of the problem. ------------------------------------------------------------------------ The reason for the mmap error message is probably addr = mmap(0, mmap_sizeparm(size), PROT_READ|PROT_WRITE, MAP_SHARED, f, 0); where "f" points to /dev/zero. (https://sources.debian.org/src/cdrkit/9:1.1.11-3/wodim/fifo.c/#L272) The man page of mmap says about the error EAGAIN ("Resource temporarily unavailable"): EAGAIN The file has been locked, or too much memory has been locked (see setrlimit(2)). man 2 setrlimit points to prlimit(1). But running it shows no mmap specific limiting parameter other than "MEMLOCK", which would only matter if flag "MAP_LOCKED" was used with the mmap() call. What do you get from this command: cat /proc/sys/kernel/shmmax (Mine says 18446744073692774399. I.e. no real limit.) What permission do you see with ls -ld /dev/shm ------------------------------------------------------------------------ As a workaround for non-superusers you could switch in Brasero from the wodim plugin to the libburn plugin. It is supposed to use a slightly different mmap() call when allocating its fifo buffer. Have a nice day :) Thomas -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to brasero in Ubuntu. https://bugs.launchpad.net/bugs/1764096 Title: Brasero can't burn DVD because of permissions issue To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/brasero/+bug/1764096/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs