Ubuntu freeze with DVD multisession

[maxguzenski]

I have a DVD record (model LG) and when I mount dvd with multisession (more 5
sessions) ubuntu freeze!
All sistem freeze (keybordo, mouse, ...)

I recorded they in Windows XP (nero)

ubuntu: 5.04
kernel: 2.6-10-5-k7 and 2.6.11-1-K7

need you more information?

sorry my bad english :(

[Matthew Lange (matthewlange)]

Does this still happen with Ubuntu 5.10 or 6.06?

[Tony Lewis (tonylewis)]

Embarrasingly, yes.

I'm new to this bug, but it's happening for me right now.

Running Ubuntu 6.06 (upgraded from 5.10) on a Dell Inspiron 8600 (Pentium M 1.8GHz, 512MB RAM.

DVD drive is a CD R/W, DVD ROM:
    lewis@matilda:~$ cat /proc/ide/hdc/model
    HL-DT-STCD-RW/DVD-ROM GCC-4243N

When I put in a multisession DVD, the drive spins up, then down a few seconds later. The entire system freezes. Ctrl-Alt-F1 doesn't get me to a console. I haven't tried any of the SysRq magic keys as I don't know them well enough.

Nothing appears in syslog or kern.log after rebooting.

The DVD itself is good - using Windows XP on this same hardware, the multisession DVD is readable. Using the DVD on an Acer laptop likewise running Ubuntu 6.06 (fresh 6.06 install unlike the upgrade mentioned above), both sessions are visible.

So, some combination of multisession DVD + Inspiron 8600 + Ubuntu is making this crash.

I am able to test more if you give me directions. The DVD is personal backup data, so I can't share it. If interest is high enough, I can try and get the author to make another one containing innocuous data to replicate the problem, and then I can share it.

[Martin Bergner (martin-bergner)]

I suppose this is a kernel bug.

[Kasper Peeters (kasper-peeters)]

I can confirm this on kernel 2.6.15-27-686 on an IBM t60 with
MATSHITA DVD-RAM UJ-842 Rev RB01.

[Brian Murray (brian-murray)]

Thanks for taking the time to report this bug and helping to make Ubuntu better. Unfortunately we can't fix it, because your description doesn't yet have enough information.
Please include as attachments the following additional information, if you have not already done so (please pay attention to lspci's additional options), as required by the Ubuntu Kernel Team:
1. Please include the output of the command 'uname -a' in your next response. It should be one, long line of text which includes the exact kernel version you're running, as well as the CPU architecture.
2. Please run the command 'dmesg > dmesg.log' and attach the resulting file 'dmesg.log' to this bug report.
3. Please run the command 'sudo lspci -vvnn > lspci-vvnn.log' and attach the resulting file 'lspci-vvnn.log' to this bug report.
For your reference, the full description of procedures for kernel-related bug reports is available at https://wiki.ubuntu.com/KernelTeamBugPolicies . Thanks in advance!

[Tony Lewis (tonylewis)]

Hmm, I'm no longer seeing this bug (though I'm not the original reporter). Laptop is still Ubuntu 6.06, but I guess an intervening kernel upgrade (still Dapper) fixed it.

[Brian Murray (brian-murray)]

This bug report is being closed due to your last comment regarding this being fixed with an update. Thanks again for taking the time to report this bug and helping to make Ubuntu better. Feel free to submit any future bugs you may find.