Blank DVD is not detected / cannot burn

A bug as been reported me to where some DVD-RW drives are unable to detect blank DVDs. Apparently this is a regression issue, as the reporting user is insisting that they used to be able to burn DVDs using the same hardware.

The reporting user provided this dmesg output. I believe they tried a few different disks to gain this response.

I am pasting dmesg output from these attempts:

[ 3563.989601] sr 5:0:1:0: [sr0] Unhandled sense code
[ 3563.989606] sr 5:0:1:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 3563.989609] sr 5:0:1:0: [sr0] Sense Key : Medium Error [current]
[ 3563.989614] sr 5:0:1:0: [sr0] ASC=0x10 <<vendor>> ASCQ=0x90
[ 3563.989621] sr 5:0:1:0: [sr0] CDB: Read(10): 28 00 00 05 6f 60 00 00 02 00
[ 3563.989629] end_request: I/O error, dev sr0, sector 1424768
[ 3563.989633] quiet_error: 3 callbacks suppressed
[ 3563.989636] Buffer I/O error on device sr0, logical block 178096
[ 3607.084661] sr 5:0:1:0: [sr0] Device not ready
[ 3607.084665] sr 5:0:1:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 3607.084669] sr 5:0:1:0: [sr0] Sense Key : Not Ready [current]
[ 3607.084673] sr 5:0:1:0: [sr0] Add. Sense: Medium not present
[ 3607.084677] sr 5:0:1:0: [sr0] CDB: Read(10): 28 00 00 00 00 1e 00 00 02 00
[ 3607.084685] end_request: I/O error, dev sr0, sector 120
[ 3607.084690] Buffer I/O error on device sr0, logical block 15
[ 3607.090021] sr 5:0:1:0: [sr0] Device not ready
[ 3607.090023] sr 5:0:1:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 3607.090026] sr 5:0:1:0: [sr0] Sense Key : Not Ready [current]
[ 3607.090029] sr 5:0:1:0: [sr0] Add. Sense: Medium not present
[ 3607.090032] sr 5:0:1:0: [sr0] CDB: Read(10): 28 00 00 00 00 1e 00 00 02 00
[ 3607.090039] end_request: I/O error, dev sr0, sector 120
[ 3607.090042] Buffer I/O error on device sr0, logical block 15
[ 3607.095382] sr 5:0:1:0: [sr0] Device not ready
[ 3607.095384] sr 5:0:1:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 3607.095387] sr 5:0:1:0: [sr0] Sense Key : Not Ready [current]
[ 3607.095390] sr 5:0:1:0: [sr0] Add. Sense: Medium not present
[ 3607.095393] sr 5:0:1:0: [sr0] CDB: Read(10): 28 00 00 00 00 1e 00 00 02 00
[ 3607.095400] end_request: I/O error, dev sr0, sector 120
[ 3607.095403] Buffer I/O error on device sr0, logical block 15
[ 3607.099609] sr 5:0:1:0: [sr0] Device not ready
[ 3607.099613] sr 5:0:1:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 3607.099617] sr 5:0:1:0: [sr0] Sense Key : Not Ready [current]
[ 3607.099620] sr 5:0:1:0: [sr0] Add. Sense: Medium not present
[ 3607.099624] sr 5:0:1:0: [sr0] CDB: Read(10): 28 00 00 00 00 1e 00 00 02 00
[ 3607.099632] end_request: I/O error, dev sr0, sector 120
[ 3607.099636] Buffer I/O error on device sr0, logical block 15
[ 3607.104870] sr 5:0:1:0: [sr0] Device not ready
[ 3607.104872] sr 5:0:1:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 3607.104875] sr 5:0:1:0: [sr0] Sense Key : Not Ready [current]
[ 3607.104878] sr 5:0:1:0: [sr0] Add. Sense: Medium not present
[ 3607.104882] sr 5:0:1:0: [sr0] CDB: Read(10): 28 00 00 00 00 1e 00 00 02 00
[ 3607.104889] end_request: I/O error, dev sr0, sector 120
[ 3607.104892] Buffer I/O error on device sr0, logical block 15
[ 3607.111000] sr 5:0:1:0: [sr0] Device not ready
[ 3607.111006] sr 5:0:1:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 3607.111010] sr 5:0:1:0: [sr0] Sense Key : Not Ready [current]
[ 3607.111014] sr 5:0:1:0: [sr0] Add. Sense: Medium not present
[ 3607.111021] sr 5:0:1:0: [sr0] CDB: Read(10): 28 00 00 00 00 1e 00 00 02 00
[ 3607.111028] end_request: I/O error, dev sr0, sector 120
[ 3607.111033] Buffer I/O error on device sr0, logical block 15
[ 3607.116389] sr 5:0:1:0: [sr0] Device not ready
[ 3607.116391] sr 5:0:1:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 3607.116394] sr 5:0:1:0: [sr0] Sense Key : Not Ready [current]
[ 3607.116398] sr 5:0:1:0: [sr0] Add. Sense: Medium not present
[ 3607.116401] sr 5:0:1:0: [sr0] CDB: Read(10): 28 00 00 00 00 1e 00 00 02 00
[ 3607.116408] end_request: I/O error, dev sr0, sector 120
[ 3607.116410] Buffer I/O error on device sr0, logical block 15
[ 3635.494275] sr 5:0:1:0: [sr0] Unhandled sense code
[ 3635.494279] sr 5:0:1:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 3635.494283] sr 5:0:1:0: [sr0] Sense Key : Medium Error [current]
[ 3635.494287] sr 5:0:1:0: [sr0] ASC=0x10 <<vendor>> ASCQ=0x90
[ 3635.494293] sr 5:0:1:0: [sr0] CDB: Read(10): 28 00 00 05 6f 60 00 00 02 00
[ 3635.494301] end_request: I/O error, dev sr0, sector 1424768
[ 3635.494307] Buffer I/O error on device sr0, logical block 178096
[ 3647.817487] ISO 9660 Extensions: Microsoft Joliet Level 3
[ 3648.020437] ISO 9660 Extensions: RRIP_1991A
[ 3791.322659] cdrom: This disc doesn't have any tracks I recognize!

The same user later reported the following log messages:

[ 3912.648032] Clocksource tsc unstable (delta = -231260494 ns)
[ 4306.359731] cdrom: This disc doesn't have any tracks I recognize!

Two of the users were kind enough to provide qpxtool print screens:
http://launchpadlibrarian.net/54734405/qpxtool-drive.jpg
http://launchpadlibrarian.net/54788615/qpxtool-screenshot.png

Any help, or pointers in the right direction would be appreciated.

Kind regards,
Lee

You neglected to say what kernel? I assume 2.6.35

So these are all direct pass throughs. That likely means the problem is in the setup on the burner. If there's some filesystem above this, there was a Read/Write flag error in blk_rq_map_kern ... but that was introduced in 2.6.36-rc1.

The only recent changes to sr were the BLK pushdown and they were post 2.6.35.

James

linux-scsi cc re-added, please don't drop ... others may know more than me.

OK, I'd still lay better odds on a burner program problem ... but since it's so old, a bisection is likely needed. Which kernel actually worked?

James

Rather than provide you with little pieces of information at a time, all the information I have been given is in this bug report:

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/613214