Thread View: alt.os.linux.mandrake
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Started by Phill Edwards
Mon, 12 Jul 2004 12:24
Very, very strange CDROM behaviour and noises
Author: Phill Edwards
Date: Mon, 12 Jul 2004 12:24
Date: Mon, 12 Jul 2004 12:24
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3026 bytes
I've recently posted a problem I've been getting with my CDROM not working under kernel 2.6. Under 2.4 it works perfectly. I've got some more symptoms which are very odd & scary. I should point out that I have been through the CDROM HOWTO to try to nail this but to no avail. The one part that I couldn't get to work in the troubleshooting section was "Can you read data from the drive?". I ran: # dd if=/dev/cdrom of=/dev/null bs=2048 the green CD light went on but no data was read. I couldn't Ctrl-C out and the only way I could stop it was pushing the eject button on the CD itself. Then, and only then, lots of these these messages appeared in syslog. Jul 12 22:08:43 ash kernel: hdd: tray open Jul 12 22:08:43 ash kernel: end_request: I/O error, dev hdd, sector 88 Jul 12 22:08:43 ash kernel: Buffer I/O error on device hdd, logical block 11 ls -l /dev/cdrom gives lrwxrwxrwx 1 root root 3 Jun 10 21:01 /dev/cdrom -> hdd ls -l /dev/hdd gives brw-rw---- 1 root cdrom 22, 64 Sep 2 2001 /dev/hdd I believe these are what they're supposed to be. The HOWTO suggests a hardware problem in this case, BUT the CD works perfectly under 2.4 any time I boot back into a 2.4 kernel. So this can't be a hardware problem. Finally, when I try to mount the CD and wait for it (without pressing the eject button) nothing happens until after 1 or 2 minutes when a rapid clunk,clunk,clunking noise appears from the PC and all network and keyboard interfaces freeze up. If I press the hardware reset button the clunking noise continues right through the BIOS check and hdc and hdd can't be detected. The only way to stop the noise is to fully power off, after which it boots up corectly and the BIOS detects hcc and hdd. Still no CDROM functionality after the boot into kernel 2.6 though. So I'm now extremely stuck and would appreciate any ideas anyone might have. I was wondering whether there's some sort of issue with the CD being a slave on the 2nd IDE interface under 2.6 perhaps? My full kernel version is 2.6.3, release 13mdk. TIA, Phill
Re: Very, very strange CDROM behaviour and noises
Author: Mark Harriss
Date: Mon, 12 Jul 2004 13:05
Date: Mon, 12 Jul 2004 13:05
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Is it an LG cdrom?
Re: Very, very strange CDROM behaviour and noises
Author: xaoycoj
Date: Mon, 12 Jul 2004 13:27
Date: Mon, 12 Jul 2004 13:27
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|I've recently posted a problem I've been getting with my CDROM not working |under kernel 2.6. Under 2.4 it works perfectly. I've got some more symptoms |which are very odd & scary. I should point out that I have been through the |CDROM HOWTO to try to nail this but to no avail. The one part that I |couldn't get to work in the troubleshooting section was "Can you read data |from the drive?". I ran: | |# dd if=/dev/cdrom of=/dev/null bs=2048 | |the green CD light went on but no data was read. I couldn't Ctrl-C out and |the only way I could stop it was pushing the eject button on the CD itself. |Then, and only then, lots of these these messages appeared in syslog. Are you perhaps fighting an automounter process for access to the CDROM? --
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