-------- Forwarded Message --------
From: R S Chakravarti <email@example.com>
Subject: Re: Re: Bug#644747: linux-image-3.0.0-2-amd64: udev doesn't create /dev/sr0, /dev/cdrom
Date: 9 Oct 2011 04:36:25 -0000
Thanks for responding.
Hope you don't mind a personal reply this time
(I don't know what I'm expected to do "officially"!).
I tried "modprobe sr_mod" but it didn't get loaded.
I'm attaching the dmesg file you asked for.
On Sat, 08 Oct 2011 23:53:47 +0530 wrote
>On Sat, 2011-10-08 at 23:21 +0530, R S Chakravarti wrote:
> Package: linux-2.6
> Version: 3.0.0-5
> Severity: important
> Dear Maintainer,
> *** Please consider answering these questions, where appropiate ***
> * What led up to the situation? I noticed that it didn't mount the
> * What exactly did you do (or not do) that was effective (or
> ineffective)? I added the entry "cdrom" in /etc/modules.
> * What was the outcome of this action? The module "cdrom" gets loaded
> but /dev/sr0 is not created.
> * What outcome did you expect instead? I thought /dev/sr0 would be
The 'cdrom' module is not a driver but is *used* by drivers. The driver
for the SATA interface (ata_piix in this case) is supposed to detect
SATA devices and request the appropriate driver for the device types
found (sr_mod for a CD-ROM). Since sr_mod has not been loaded, it
appears that the problem is in device detection. (And loading sr_mod
should have no more effect than loading cdrom, because no device has
been found for it to bind to.)
> *** End of the template - remove these lines ***
> -- Package-specific info:
> ** Version:
> Linux version 3.0.0-2-amd64 (Debian 3.0.0-5) (firstname.lastname@example.org)
(gcc version 4.5.3 (Debian 4.5.3-9) ) #1 SMP Fri Oct 7 20:48:45 UTC 2011
> ** Command line:
root=UUID=2237ebe0-15cb-40db-bed9-d4f5ff052689 ro single
> ** Tainted: O (4096)
> * Out-of-tree module has been loaded.
> ** Kernel log:
> [ 20.693330] HDA Intel 0000:00:1b.0: PCI INT A -> GSI 22 (level, low)
-> IRQ 22
> [ 20.693453] HDA Intel 0000:00:1b.0: irq 43 for MSI/MSI-X
After reading the Ubuntu bug report (#794642) I found that this Debian bug is also due to the SATA mode in my computer being set to IDE. When this is changed to AHCI the problem vanishes: /dev/cdrom appears.
On Sun, 09 Oct 2011 11:04:41 +0530 wrote
>On Sun, 2011-10-09 at 04:36 +0000, R S Chakravarti wrote:
> Thanks for responding.
> Hope you don't mind a personal reply this time
> (I don't know what I'm expected to do "officially"!).
You should keep cc'ing the bug address. I've forwarded your message
> I tried "modprobe sr_mod" but it didn't get loaded.
> I'm attaching the dmesg file you asked for.
OK, this shows:
[ 1.818602] ata2.00: ATAPI: HL-DT-ST DVDRAM GH22NS50, TN02, max UDMA/100
On Mon, Oct 10, 2011 at 04:52:55AM -0000, R S Chakravarti wrote:
> After reading the Ubuntu bug report (#794642) I found that this
> Debian bug is also due to the SATA mode in my computer being set to
> IDE. When this is changed to AHCI the problem vanishes: /dev/cdrom
Right, I thought that might work.
Would you mind testing the patch with the SATA interface back in
We get into the habit of living before acquiring the habit of thinking.
- Albert Camus
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