Re: system freeze on cdrom failure

From: Randy.Dunlap
Date: Thu Aug 03 2006 - 00:05:24 EST

On Wed, 02 Aug 2006 23:01:41 -0500 Kyle Davenport wrote:

> I posted on this before, and I'm confirming that the problem is still
> happening at Problem started with 2.6.15*. Saw it again
> in 2.6.16. If I reboot into 2.6.13, I still see some cdrom and/or scsi
> errors, but the system does not freeze. This was from running grip on a
> music cd. It also happens just reading most burned cd's or dvd's.
> Aug 1 23:23:00 quickest kernel: cdrom: dropping to single frame dma
> Aug 1 23:23:02 quickest kernel: BUG: unable to handle kernel NULL
> pointer dereference at virtual address 0000000c
> Problem drive is Toshiba DVD-ROM SD-M1401 (scsi). I do not see any
> errors with the same media in a Yamaha CRW2100S (scsi burner).
> Tyan Thunder K7X-Pro (S2469UNG)/ 2x2400 Athlon MP/ 1GB ram / 1TB disk /
> gcc 3.2
> This is easily repeatable - please ask for more info!

more info, please.
Like a full backtrace. And can you test 2.6.18-rc3 also?

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