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From Bugzilla Helper: User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.1b) Gecko/20020721 Description of problem: I have a ricoh cd-r/rw MP7083A and a LG dvd-rom drd-8160B. I installed redhat linux 8.0 using the ricoh drive. When I try and play a cd it will mount and play fine in the dvd-rom drive (hdd) but the system hangs if I insert a cd in the ricoh drive (hdc). The gnome session/x session totally freezes, no mouse etc. The only way to resolve the situation is a hard reboot. Version-Release number of selected component (if applicable): How reproducible: Always Steps to Reproduce: 1.put cd into ricoh drive 2. system freezes 3. Actual Results: system freexes Expected Results: should mount cd Additional info: The ricoh cd-r drive works perfectly in win xp and has worked okay in rh linux 7.0 to 7.3, if dma was diaabled.
I believe I have solved the problem. I downloaded hdparm and I looked at the dma state of dev/hdc. DMA was set as 1 (i.e. on) so I did a hdparm -d0 /dev/hdc. Following this I was able to insert a cd and it mounted ok.
Moving to kernel but I assume they will close it as a bad hardware issue.
hardware - though it may be related to some kernel timing stuff, so if it still breaks in the next RH release do open a new bug