Hi Tejun, Is it possible that the DMA workaround for sata_sil and the Samsung SH-S183A DVD writer was lost for 2.6.24-rc1? I found this in syslog: Oct 28 11:29:08 pluto kernel: ata4.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen Oct 28 11:29:08 pluto kernel: ata4.00: cmd a0/01:00:00:10:00/00:00:00:00:00/a0 tag 0 cdb 0xa4 data 16 in Oct 28 11:29:08 pluto kernel: res 40/00:02:00:0c:00/00:00:00:00:00/a0 Emask 0x4 (timeout) Oct 28 11:29:08 pluto kernel: ata4.00: status: { DRDY } Oct 28 11:29:08 pluto kernel: ata4: soft resetting link Oct 28 11:29:13 pluto kernel: ata4: port is slow to respond, please be patient (Status 0xf8) Oct 28 11:29:18 pluto kernel: ata4: SRST failed (errno=-16) Oct 28 11:29:18 pluto kernel: ata4: hard resetting link Oct 28 11:29:19 pluto kernel: ata4: SATA link up 1.5 Gbps (SStatus 113 SControl 310) Oct 28 11:29:19 pluto kernel: ata4.00: configured for UDMA/33 Oct 28 11:29:19 pluto kernel: ata4: EH complete Oct 28 11:29:26 pluto kernel: ata4.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen Oct 28 11:29:26 pluto kernel: ata4.00: cmd a0/01:00:00:10:00/00:00:00:00:00/a0 tag 0 cdb 0xa4 data 16 in Oct 28 11:29:26 pluto kernel: res 40/00:02:00:0c:00/00:00:00:00:00/a0 Emask 0x4 (timeout) Oct 28 11:29:26 pluto kernel: ata4.00: status: { DRDY } Oct 28 11:29:27 pluto kernel: ata4: soft resetting link Oct 28 11:29:32 pluto kernel: ata4: port is slow to respond, please be patient (Status 0xf8) Oct 28 11:29:37 pluto kernel: ata4: SRST failed (errno=-16) Oct 28 11:29:37 pluto kernel: ata4: hard resetting link Oct 28 11:29:37 pluto kernel: ata4: SATA link up 1.5 Gbps (SStatus 113 SControl 310) Oct 28 11:29:38 pluto kernel: ata4.00: configured for UDMA/33 Oct 28 11:29:38 pluto kernel: ata4: EH complete Oct 28 11:29:38 pluto kernel: sr0: disc change detected. Its difficult to reproduce, though. Regards Harri - To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html