Kernel doesn't support UDF

[Ihatewindows]

I was pulling my hair out for the last six months trying to figure out why the heck some DVDs (encrypted, pressed, burned, it doesn't matter) just will not be recognized. In the GNOME Disk Utility, the disks show up as X.X GB Unknown, and will not mount. I have to manually go into a terminal, type

sudo mount /dev/sr0 /mnt

and just deal with it. This is a real pain, and I just recently figured out why. According to this:

http://superuser.com/questions/730130/how-to-get-ubuntu-12-04-to-recognize-the-udf-filesystem

in addition to this:

http://www.linuxquestions.org/questions/linux-desktop-74/some-udf-dvds-will-not-mount-unknown-filesystem-4175550577/

I deduced that the kernel was not compiled with UDF support.

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: linux-image-4.2.0-22-generic 4.2.0-22.27
ProcVersionSignature: Ubuntu 4.2.0-22.27-generic 4.2.6
Uname: Linux 4.2.0-22-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.19.1-0ubuntu5
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: ihatewindows 28002 F.... pulseaudio
CurrentDesktop: Unity
Date: Fri Jan 22 13:55:28 2016
HibernationDevice: RESUME=UUID=2f0f1d7c-4117-40df-9314-f2556c82fc3b
InstallationDate: Installed on 2015-11-12 (71 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
MachineType: Dell Inc. Latitude E5420
ProcEnviron:
 LANGUAGE=en_US
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.2.0-22-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-4.2.0-22-generic N/A
 linux-backports-modules-4.2.0-22-generic N/A
 linux-firmware 1.149.3
SourcePackage: linux
UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/30/2011
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A05
dmi.board.name: 0H5TG2
dmi.board.vendor: Dell Inc.
dmi.board.version: A03
dmi.chassis.type: 9
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA05:bd11/30/2011:svnDellInc.:pnLatitudeE5420:pvr01:rvnDellInc.:rn0H5TG2:rvrA03:cvnDellInc.:ct9:cvr:
dmi.product.name: Latitude E5420
dmi.product.version: 01
dmi.sys.vendor: Dell Inc.

[Brad Figg (brad-figg)]

This change was made by a bot.

[Joseph Salisbury (jsalisbury)]

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.5 kernel[0].

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.5-rc2-wily/

[Ihatewindows (ihatewindows522)]

Alright, new kernel did nothing. Same exact problem. Uninstalling immediately.

[Ihatewindows (ihatewindows522)]

Didn't see the part where you said to mark it as "confirmed", did that just now.

[Erick Brunzell (lbsolost)]

I'm leaning towards this being a duplicate of bug 1577768, or vice versa, and thinking the actual culprit may be util-linux / libblkid1.

[Erick Brunzell (lbsolost)]

"I'm leaning towards this" ..................... "this" being the ability to mount optical discs with existing data.