[scsi and ide list cc's added] On Sun, 2008-03-02 at 21:53 +0100, Mikael Pettersson wrote: > On my main workstation (Intel P965 chipset, ICH8 SATA driven by ahci, > Samsung/Toshiba SH-203P SATA DVD writer, FC5 user-space), cdrecord > stopped working on the 2.6.25-rc3 kernel, with the complaint: > > Warning: controller returns zero sized CD capabilities page. > Warning: controller returns wrong page 0 for CD capabilities page (2A). > > There's nothing in dmesg to suggest that the kernel has experienced > some problem. > > 2.6.25-rc2-git2 was the last working kernel, 2.6.25-rc2-git3 up to > today's 2.6.25-rc3-git3 are all non-working. > > I've narrowed the cause down to these two commits in 2.6.25-rc2-git3: > > 40b01b9bbdf51ae543a04744283bf2d56c4a6afa > block: update bio according to DMA alignment padding > > 6b00769fe1502b4ad97bb327ef7ac971b208bfb5 > block: add request->raw_data_len > > Four or so subsequent commits depend on the second of these, so it's > easier to test them by applying them to -git2 than to revert them. > > Also, these two need to be treated as a unit. With only the first > applied, I get a massive delay as init tries to start udev, and then > if I try cdrecord it hangs in an unkillable state. > > I've put some information in > <http://user.it.uu.se/~mikpe/linux/bug-2.6.25-rc3-cdrecord/>: > - the kernel's .config > - cdrecord -VV dev=/dev/scd0 blank=fast output for 2.6.25-rc2-git2 and -git3 > - strace -v logs for the above cdrecord runs I think this is another manifestation of this problem: http://marc.info/?t=120358360500002 The fix for which is being actively discussed here: http://marc.info/?t=120418867400002 James -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
