System freeze if reading from DVD Toshiba SD-R6112

[Djainette]

Using a Toshiba SD-R6112 slim DVD drive with the latest firmware on Hardy.

Since upgrading to Hardy, I've had several problems with this drive.

- previously burned single layer DVD-R aren't recognized. When trying to mount them, I get the message "No medium".

- Burning ends with no error but disks are end up blank.

- worse, each time I try to read a commercial dual-layer DVD, I get a complete system freeze : no mouse, no keyboard, I have to hard reboot my machine. It happens in xine, in DVD Shrink via wine, and even when I try to "cat /dev/scd0 > /dev/null".

The freezing happens on all DVD, totally randomly (it happens right away or after a few seconds on the same disk).
No message in the various logs.
The system even froze with a burned xubuntu CD.
I've just read 2 DVDs flawlessly with XP.

First I thought the drive was dead, but it seems to work with XP, so it might be a hal or a kernel problem. I don't mind the burning problem, but it's a real pain not be able to read a DVD on a laptop without damaging my hard drives...

[Leann Ogasawara (leannogasawara)]

The Ubuntu Kernel Team is planning to move to the 2.6.27 kernel for the upcoming Intrepid Ibex 8.10 release. As a result, the kernel team would appreciate it if you could please test this newer 2.6.27 Ubuntu kernel. There are one of two ways you should be able to test:

1) If you are comfortable installing packages on your own, the linux-image-2.6.27-* package is currently available for you to install and test.

--or--

2) The upcoming Alpha5 for Intrepid Ibex 8.10 will contain this newer 2.6.27 Ubuntu kernel. Alpha5 is set to be released Thursday Sept 4. Please watch http://www.ubuntu.com/testing for Alpha5 to be announced. You should then be able to test via a LiveCD.

Please let us know immediately if this newer 2.6.27 kernel resolves the bug reported here or if the issue remains. More importantly, please open a new bug report for each new bug/regression introduced by the 2.6.27 kernel and tag the bug report with 'linux-2.6.27'. Also, please specifically note if the issue does or does not appear in the 2.6.26 kernel. Thanks again, we really appreicate your help and feedback.

[Djainette (djainette)]

I've just dowloaded and installed the package from http://packages.ubuntu.com/intrepid/i386/linux-image-2.6.27-2-generic/download
After a reboot on the new kernel (with acpi=off as usual), I tried a "cat /dev/scd0 > /dev/null" from a commercial DVD9 and got the same system freeze as before.

[Djainette (djainette)]

Still freezing with 2.6.27-6-generic

[Djainette (djainette)]

Still buggy with the 11/16/08 xubuntu 8.10 daily live. Can't reinstall my system to test other bugs with a fresh install.

[Launchpad Janitor (janitor)]

Per a decision made by the Ubuntu Kernel Team, bugs will longer be assigned to the ubuntu-kernel-team in Launchpad as part of the bug triage process. The ubuntu-kernel-team is being unassigned from this bug report. Refer to https://wiki.ubuntu.com/KernelTeamBugPolicies for more information. Thanks.