Bug 11236

Summary: dvd driver stops working with 2.6.26
Product: IO/Storage Reporter: Dionisus Torimens (djtm)
Component: Serial ATAAssignee: Tejun Heo (tj)
Status: CLOSED INVALID    
Severity: normal CC: akpm
Priority: P1    
Hardware: All   
OS: Linux   
Kernel Version: 2.6.26 Subsystem:
Regression: Yes Bisected commit-id:
Attachments: dmesg 2.6.25.13
dmesg 2.6.26.1
lspsi 2.6.25.13
lspci 2.6.26.1

Description Dionisus Torimens 2008-08-02 13:28:59 UTC 
Latest working kernel version: 2.6.25.13
Earliest failing kernel version: 2.6.26 (earliest tested)
Distribution: Ubuntu 8.04
Hardware Environment: Acer Extensa 5220
Software Environment: Single User Mode.

Problem Description:

Starting with 2.6.26 my dvd drive is no longer detected.
It simply doesn't show up on boot. (ls /dev/scd0; dmesg|grep dvd)
If I manually insert the modules nothing happens either.
Comment 1 Andrew Morton 2008-08-02 13:47:12 UTC 
Please attach the output from `dmesg -s 1000000'
for both the 2.6.25 and 2.6.26 kernels.  Also the
`lspci -vvxx' output.

Thanks.
Comment 2 Tejun Heo 2008-08-02 20:04:23 UTC 
Hmmm... The biggest change form 2.6.25 to 2.6.26 regarding probing is defaulting to hardreset.  But your machine is based on ICH7 where hardreset has been extensively tested and used.  Strange.  Please report what Andrew asked.  Thanks.
Comment 3 Dionisus Torimens 2008-08-02 21:58:08 UTC 
Created attachment 17064 [details]
dmesg 2.6.25.13
Comment 4 Dionisus Torimens 2008-08-02 21:58:37 UTC 
Created attachment 17065 [details]
dmesg 2.6.26.1
Comment 5 Dionisus Torimens 2008-08-02 21:59:17 UTC 
Created attachment 17066 [details]
lspsi 2.6.25.13
Comment 6 Dionisus Torimens 2008-08-02 22:05:33 UTC 
Created attachment 17067 [details]
lspci 2.6.26.1
Comment 7 Tejun Heo 2008-08-02 22:11:43 UTC 
Looks like ata_piix hasn't been loaded at all?  Does modprobe ata_piix magically fix the problem?
Comment 8 Dionisus Torimens 2008-08-02 23:07:09 UTC 
Ooops. Sorry.

I thought the Sata driver is enough.