https://bugzilla.novell.com/show_bug.cgi?id=262340 Summary: Kernel update interferes with CD/DVD burning, DMA Product: openSUSE 10.2 Version: Final Platform: Other OS/Version: Other Status: NEW Severity: Normal Priority: P5 - None Component: Kernel AssignedTo: kernel-maintainers@forge.provo.novell.com ReportedBy: kq8z67r6309fo9001@sneakemail.com QAContact: qa@suse.de Hopefully this isn't a duplicate of one of the many other CD/DVD burning bugs-appears not.... After the update from 2.6.18.2-34 to 2.6.18.8-0.1, CD and DVD burning don't work terribly well. The former will usually fail, and the latter just slows to about 1-2x speed. The cause appears to be that something is happening to disable DMA on the drive; from /var/log/messages: Apr 6 03:29:48 hostname kernel: hdc: irq timeout: status=0xd0 { Busy } Apr 6 03:29:48 hostname kernel: ide: failed opcode was: unknown Apr 6 03:29:48 hostname kernel: hdc: DMA disabled Apr 6 03:29:48 hostname kernel: hdc: ATAPI reset complete For DVDs, one can actually re-enable DMA with hdparm -d1 /dev/hdc, even whilst burning, but the chances of it staying on for the duration are poor. The point of initial (and subsequent, if re-enabled) loss of DMA appears to be random. DVDs burned in this manner appear to be readable, though as noted above CD burning fails completely. I tried reseating data cables, replacing data cables, switching IDE controllers, etc. with no effect. These efforts were probably superfluous as the problem did not and does not occur with kernel 2.6.18.2-34; otherwise I would assume from past experience that this is a hardware problem. It is not presently convenient to test with another drive, unfortunately. Motherboard is an Abit NF7-S (nforce2 chipset), DVD burner is an NEC ND-3550A. CDs burned with k3b and directly with cdrecord ("wodim" now, I guess). DVDs burned with k3b and directly with growisofs. There are some similar experiences reported, e.g.: http://www.fedoraforum.org/forum/showthread.php?t=101712 though in that case the problem appeared to be more severe. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug, or are watching someone who is.