Try to burn as a root and see if it succeeds.. there are some problems with 2.6 later kernels where CD burning will not work as a normal user but will work as root.. Search google or lkml to find more info about it. On Thursday 18 November 2004 11:52 am, James PEARSON wrote:

Hello all,

I am looking for some ideas on how to troubleshoot the following problem.

<problem> My first attempt to burn a CD with a fresh install of SuSE 9.2 didn't work. # Error message : ERROR: Read buffer capacity failed. </problem>

<facts> system: linux 2.6.8-24-smp #1 SMP Wed Oct 6 09:16:23 UTC 2004 i686 athlon i386 GNU/Linux Burner: Plextor 40/12/40A

Other info... CD disk: I was using a Verbatim 48X CD-R Cdrdoa driver: generic-mmc Remark: The driver "generic-mmc" has worked in the past and it works fine under Knoppix. I set the burn speed at 20 (which is k3b's average burn speed when it works).

System ----------------------- K3b Version:0.11.15cvs suse-linux-e@suse.com, KDE Version: 3.3.0 QT Version: 3.3.3 </facts>

########################################## Here what I found using google... ##########################################

...

...

ERROR: Read buffer capacity failed.

I submitted a patch for this a few days ago. It has been merged into Linus's tree.

Yes, I see the patch, thanks:

http://www.kernel.org/pub/linux/kernel/v2.6/testing/cset/cset-axboe% 40suse.de[torvalds] ChangeSet|20041104154725|45958.txt

But the question remains: what should the users of not 100% MMC-compatible CR-RW drives (i.e. those which have a separate cdrado or cdrecord driver, not generic-mmc/generic-mmc-raw) do? Is the support for writing as non-root on such drives just dropped without any plans to "fix" it?

########################################## Here k3b's log ########################################## System ----------------------- K3b Version:0.11.15cvs KDE Version: 3.3.0 QT Version: 3.3.3

cdrdao ----------------------- Cdrdao version 1.1.9 - (C) Andreas Mueller SCSI interface library - (C) Joerg Schilling Paranoia DAE library - (C) Monty Check http://cdrdao.sourceforge.net/drives.html#dt for current driver tables. Using libscg version 'schily-0.8' /dev/hdc: PLEXTOR CD-R PX-W4012A Rev: 1.06 Using driver: Generic SCSI-3/MMC - Version 2.0 (options 0x0010) Burning entire 79 mins disc. Starting write at speed 20... Process can be aborted with QUIT signal (usually CTRL-\). WARNING: No super user permission to setup real time scheduling. Turning BURN-Proof on Executing power calibration... Power calibration successful. Writing track 01 (mode MODE1/MODE1 )... ERROR: Read buffer capacity failed. Wrote 1 of 727 MB (Buffer 100%). Success. : scsi sendcmd: no error CDB: 2A 00 00 00 03 39 00 00 1A 00 status: 0x2 (CHECK CONDITION) Sense Bytes: F0 00 03 00 00 03 CF 0A 00 00 00 00 02 00 00 00 Sense Key: 0x3 Medium Error, Segment 0 Sense Code: 0x02 Qual 0x00 (no seek complete) Fru 0x0 Sense flags: Blk 975 (valid) resid: 53248 cmd finished after 76.544s timeout 180s ERROR: Write data failed. ERROR: Writing failed - buffer under run? ERROR: Writing failed.

cdrdao comand: ----------------------- /usr/bin/cdrdao write --device /dev/hdc --driver generic-mmc:0x00000010 --speed 20 -n -v 2 --eject --remote 21 /tmp/kde-jpearson/k3b4pwvYatoc ##########################################

Any ideas and/or comments would be appreciated.

TIA James

-- Osho