As I mentioned above, I was having the same issue, and the workarounds I tried didn't help. I had been using an external DVD, plugged into a USB2 card.
After I installed an internal DVD, the problem disappeared completely, and now works for me. -- I can't write a cd https://bugs.launchpad.net/bugs/149076 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs