Gentoo Archives: gentoo-user

From: Philip Webb <purslow@××××××××.net>
To: Gentoo User <gentoo-user@l.g.o>
Subject: [gentoo-user] /dev/sr0 has disappeared: big mystery
Date: Fri, 15 May 2009 09:01:05
Message-Id: 20090515090059.GA4677@ca.inter.net
1 For the 1st time in 2 months, I went to write a CD & discovered
2 that /dev/sr0 is not being created nor symlink /dev/cdrom ;
3 I looked at 'dmesg': no mention of 'sr' or 'cd' being found.
4
5 I've searched the Forum (more noise than signal as usual) & Bugs: nothing.
6
7 I tested the drive: SystemRescue 1.1.0 (kernel 2.6.25.16) starts correctly
8 & mounts /dev/sr0 on /mnt/cdrom ; its 'dmesg' says :
9
10 sr0: scsi3-mmc drive: 16x/16x writer dvd-ram cd/rw xa/form2 cdda tray \
11 Uniform CD-ROM driver Revision: 3.20
12
13 BIOS reports "Auto-detecting PATA primary master: ATAPI CD-ROM".
14
15 I updated to Hal-0.5.11-r8 on 090221 & Udev-124-r2 on 090418 ;
16 I recompiled Udev, but that made no difference.
17 I've checked the files which mention 'cd' in /etc/udev/rules.d
18 & there is no difference today from those at 090315 ,
19 when I did my last system back-up & last used the CD drive.
20
21 I've checked my kernel configs for 2.6.25 & 2.6.29 using 'gvimdiff'
22 & there is no difference between the relevant sections in Devices.
23 I updated to 2.6.29 on 090404 .
24
25 I tried my other kernels with the following unnerving findings :
26 2.6.25 creates /dev/sr0 , but after X starts the mouse/keyboard fail;
27 2.6.23 & 2.6.22 create /dev/sr0 , but X won't start at all.
28
29 I notice that under 'Device Drivers -> ATA/ATAPI/MFM/RLL Support'
30 there are the lines :
31
32 generic ATA/ATAPI disk support (NEW)
33 [*] ATA disk support (NEW)
34 [ ] ATAPI floppy support (NEW)
35 < > Include IDE/ATAPI CDROM support (NEW)
36
37 I didn't say 'y' to 'ATA ... Support', so both config files (25 & 29) say
38
39 # CONFIG_IDE is not set
40
41 This is because I understood that if you have
42 'SCSI device support -> SCSI CDROM support' enabled,
43 then you shouldn't have 'ATA...RLL' enabled as well.
44 Is this a vital change in 2.6.29 ?
45
46 Has anyone else encountered this ? Does anyone have suggestions ?
47
48 --
49 ========================,,============================================
50 SUPPORT ___________//___, Philip Webb
51 ELECTRIC /] [] [] [] [] []| Cities Centre, University of Toronto
52 TRANSIT `-O----------O---' purslowatchassdotutorontodotca

Replies

Subject Author
Re: [gentoo-user] /dev/sr0 has disappeared: big mystery Helmut Jarausch <jarausch@××××××××××××××××.de>
Re: [gentoo-user] /dev/sr0 has disappeared: big mystery Dirk Heinrichs <dirk.heinrichs@××××××.de>
Re: [gentoo-user] /dev/sr0 has disappeared: kernel bug ? Philip Webb <purslow@××××××××.net>