I'm going to attempt to summarize the bug's info to date. Based on above comments in the thread: This bug is believed a REGRESSION between Ubuntu 6.06 and the previous release 5.10. The problem is that some written DVDs (but not all) can be read under other OSes, and in fact, Breezy (5.10), but not in Ubuntu Dapper (6.06). Some users have reported success with Kubuntu Dapper (6.06) as well.
It is confirmed there is a problem that is preventing certain users from reading certain DVD discs on certain drives. What the problem is, and what is causing it, is unknown or unconfirmed. AFAIK, Reading DVDs isn't performed in user-space, it is done in the kernel. Therefore, a FIRST STEP to troubleshooting would to see if running under a *user-built kernel* built with kernel-package configured with the required DVD-reading options (notably, device support, either IDE, SCSI, or whatever your drive needs, as well as ISO9660 and UDF file system support) works. If it does, then the kernel-building system and the kernel-builders' policies need to be revised. Maybe the archives for the mailing list for the kernel team (if any) or the wiki or whatever need to be consulted to see if they knew and if there was reason. It might also help to see if this regression appeared in the upstream vanilla Linux kernel; although I assume if the config was done right, it should work, since I can burn from my custom 2.6.17 kernel on my Debian box (the other one). This would mainly be of note if upstream vanilla (or someone else) dropped drivers for certain disc drives. Additional info that may help: A user with access to similar (preferably identical) or dual/triple/quad-boot system with Windows (presumably/preferably XP; other versions' support are reported flaky, and Vista is in beta), Ubuntu Dapper (6.06), Breezy (5.10), Kubuntu Dapper (6.06), or a combination of the four, one of which is Ubuntu Dapper, to burn DVDs under Windows, Breezy, and Dapper, and see which ones are readable under which systems. Debian unstable or another system may also be a useful benchmark if available. (The above reports seem inconsistent, so a unified report on all the same hardware would show whether or not this is a software problem. Also, if it shows Dapper can read all DVDs except for those produced by Dapper (and maybe Debian Unstable), then it means there is a problem in the burning software -- my first hunch would to be to look for bugs/regressions or incompatabilities in growisofs/dvd+rw-tools, maybe in OPC or similar. The changelog for said program may help.) Further info that may help: A diff between the configs of the different kernel images for Dapper and Breezy. Assuming the report that the bug doesn't affect Kubuntu Dapper is true, a diff of the configs for the kernel image in Kubuntu versus Ubuntu would also help. (If, for example, by chance, the Dapper kernel has UDF file system support as modular (or omitted) where Breezy/Kubuntu didn't/doesn't, loading (via modprobe or similar) the module, if one was built, might help.) -- Kernel does not read DVDs, no automount https://launchpad.net/bugs/37876 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
