Red Hat Bugzilla – Bug 55641
System crashes when mounting cdrom
Last modified: 2007-04-18 12:38:00 EDT
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User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0)
Description of problem:
When inserting cd, using mount command system locks up and become
Version-Release number of selected component (if applicable):
Steps to Reproduce:
2.Use mount /dev/cdrom command
3.System halts and crashes
This definitely doesn't have anything to do with the mount package; reassigning.
Please add details about your hardware (CD-ROM device, IDE/SCSI controller the CD-ROM is connected to, etc.), since this works for us.
Does this still happen if you type (as root)
hdparm -d 0 /dev/cdrom
- Intel VC8220 motherboard
- Intel D815EEA motherboard
- Intel SE440BX motherboard
- TEAC CD-540E CD-ROM unit
- LG CW-7585-B CD-RW unit
- LG CRD 8482B CD-ROM unit
Noticed that it will play audio CD's but whenever a data CD is used the system
even after the hdparm command ?
hdparm command worked on one of the systems, need to check the others now...
Issue seems to have resolved the crash on our Intel CA810EAL and Intel VC820
motherboards. I noticed that it disables the DMA on the /dev/cdrom device is
this a known issue cause we never had any issues with it until 7.2
I'm getting so much reports about cdrom drives not doing dma properly that I'm
considering just disabling it by default for ALL cdrom drives.