With the 3.2.0-2-686-pae (Debian 3.2.20-1) kernel, prob(crash | module insert) ~ 0.9, more details below.
I decided not to do separate recovery/non-recovery boots. Instead, I made sure pata_via was blacklisted to allow module load under more controlled circumstances. Logs were captured with netconsole (with possible packet loss in a couple of cases). The DVD writer had no media present in all cases. Scenario A, libata dma=1: Tried this several times. modprobe pata_via [ 147.852512] pata_via 0000:04:00.0: version 0.3.4 [ 147.852550] pata_via 0000:04:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17 [ 147.852663] pata_via 0000:04:00.0: setting latency timer to 64 [ 147.854181] scsi6 : pata_via [ 147.854417] scsi7 : pata_via [ 147.854901] ata7: PATA max UDMA/133 cmd 0xdc00 ctl 0xd880 bmdma 0xd400 irq 17 [ 147.854913] ata8: PATA max UDMA/133 cmd 0xd800 ctl 0xd480 bmdma 0xd408 irq 17 [ 148.144658] ata7.01: ATAPI: LITE-ON DVDRW SOHW-1693S, KS09, max UDMA/66 [ 148.160672] ata7.01: configured for PIO4 [ 148.163387] scsi 6:0:1:0: CD-ROM LITE-ON DVDRW SOHW-1693S KS09 PQ: 0 ANSI: 5 [ 148.323955] sr0: scsi3-mmc drive: 48x/48x writer cd/rw xa/form2 cdda tray [ 148.323972] cdrom: Uniform CD-ROM driver Revision: 3.20 [ 148.324348] sr 6:0:1:0: Attached scsi CD-ROM sr0 (no immediate crash) Scenario B, allow DMA, but remove module immediately after loading Tried this once only, could be a coincidence. modprobe pata_via; modprobe -r pata_via [ 77.683722] pata_via 0000:04:00.0: version 0.3.4 [ 77.683759] pata_via 0000:04:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17 [ 77.683867] pata_via 0000:04:00.0: setting latency timer to 64 [ 77.684954] scsi6 : pata_via [ 77.686469] scsi7 : pata_via [ 77.686904] ata7: PATA max UDMA/133 cmd 0xdc00 ctl 0xd880 bmdma 0xd400 irq 17 [ 77.686915] ata8: PATA max UDMA/133 cmd 0xd800 ctl 0xd480 bmdma 0xd408 irq 17 [ 77.972680] ata7.01: ATAPI: LITE-ON DVDRW SOHW-1693S, KS09, max UDMA/66 [ 77.988679] ata7.01: configured for UDMA/66 [ 77.991310] scsi 6:0:1:0: CD-ROM LITE-ON DVDRW SOHW-1693S KS09 PQ: 0 ANSI: 5 [ 78.192231] ata7.01: disabled [ 78.193216] sr0: scsi3-mmc drive: 0x/0x caddy [ 78.193235] cdrom: Uniform CD-ROM driver Revision: 3.20 [ 78.193591] sr 6:0:1:0: Attached scsi CD-ROM sr0 [ 78.196772] pata_via 0000:04:00.0: PCI INT A disabled (no immediate crash) modprobe pata_via (different device enumeration) [ 790.832346] pata_via 0000:04:00.0: version 0.3.4 [ 790.832384] pata_via 0000:04:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17 [ 790.832501] pata_via 0000:04:00.0: setting latency timer to 64 [ 790.833386] scsi8 : pata_via [ 790.833597] scsi9 : pata_via [ 790.834017] ata9: PATA max UDMA/133 cmd 0xdc00 ctl 0xd880 bmdma 0xd400 irq 17 [ 790.834029] ata10: PATA max UDMA/133 cmd 0xd800 ctl 0xd480 bmdma 0xd408 irq 17 [ 791.124674] ata9.01: ATAPI: LITE-ON DVDRW SOHW-1693S, KS09, max UDMA/66 [ 791.140670] ata9.01: configured for UDMA/66 [ 791.142234] scsi 8:0:1:0: CD-ROM LITE-ON DVDRW SOHW-1693S KS09 PQ: 0 ANSI: 5 (hard crash) Scenario C, just insert the module: 6 runs like this one: modprobe pata_via [ 65.934145] pata_via 0000:04:00.0: version 0.3.4 [ 65.934184] pata_via 0000:04:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17 [ 65.934297] pata_via 0000:04:00.0: setting latency timer to 64 [ 65.935274] scsi6 : pata_via [ 65.935560] scsi7 : pata_via [ 65.936047] ata7: PATA max UDMA/133 cmd 0xdc00 ctl 0xd880 bmdma 0xd400 irq 17 [ 65.936059] ata8: PATA max UDMA/133 cmd 0xd800 ctl 0xd480 bmdma 0xd408 irq 17 [ 66.224661] ata7.01: ATAPI: LITE-ON DVDRW SOHW-1693S, KS09, max UDMA/66 [ 66.240680] ata7.01: configured for UDMA/66 [ 66.243198] scsi 6:0:1:0: CD-ROM LITE-ON DVDRW SOHW-1693S KS09 PQ: 0 ANSI: 5 (hard crash) 1 run like this: modprobe pata_via (one log line lost by netconsole?) [ 112.413922] pata_via 0000:04:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17 [ 112.414036] pata_via 0000:04:00.0: setting latency timer to 64 [ 112.415030] scsi6 : pata_via [ 112.415252] scsi7 : pata_via [ 112.415665] ata7: PATA max UDMA/133 cmd 0xdc00 ctl 0xd880 bmdma 0xd400 irq 17 [ 112.415677] ata8: PATA max UDMA/133 cmd 0xd800 ctl 0xd480 bmdma 0xd408 irq 17 [ 112.700673] ata7.01: ATAPI: LITE-ON DVDRW SOHW-1693S, KS09, max UDMA/66 [ 112.716680] ata7.01: configured for UDMA/66 [ 112.719217] scsi 6:0:1:0: CD-ROM LITE-ON DVDRW SOHW-1693S KS09 PQ: 0 ANSI: 5 (hard crash) 1 run like this: modprobe pata_via [ 56.171210] pata_via 0000:04:00.0: version 0.3.4 [ 56.171248] pata_via 0000:04:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17 [ 56.171357] pata_via 0000:04:00.0: setting latency timer to 64 [ 56.174234] scsi6 : pata_via [ 56.174524] scsi7 : pata_via [ 56.175003] ata7: PATA max UDMA/133 cmd 0xdc00 ctl 0xd880 bmdma 0xd400 irq 17 [ 56.175014] ata8: PATA max UDMA/133 cmd 0xd800 ctl 0xd480 bmdma 0xd408 irq 17 (lost a couple of log messages or died a bit sooner) (hard crash) 1 run like this: modprobe pata_via [ 105.576978] pata_via 0000:04:00.0: version 0.3.4 [ 105.577016] pata_via 0000:04:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17 [ 105.577130] pata_via 0000:04:00.0: setting latency timer to 64 [ 105.578414] scsi6 : pata_via [ 105.580212] scsi7 : pata_via [ 105.580687] ata7: PATA max UDMA/133 cmd 0xdc00 ctl 0xd880 bmdma 0xd400 irq 17 [ 105.580708] ata8: PATA max UDMA/133 cmd 0xd800 ctl 0xd480 bmdma 0xd408 irq 17 [ 105.868656] ata7.01: ATAPI: LITE-ON DVDRW SOHW-1693S, KS09, max UDMA/66 [ 105.884670] ata7.01: configured for UDMA/66 [ 105.887152] scsi 6:0:1:0: CD-ROM LITE-ON DVDRW SOHW-1693S KS09 PQ: 0 ANSI: 5 [ 106.048133] sr0: scsi3-mmc drive: 48x/48x writer cd/rw xa/form2 cdda tray [ 106.048150] cdrom: Uniform CD-ROM driver Revision: 3.20 [ 106.048497] sr 6:0:1:0: Attached scsi CD-ROM sr0 (no crash) modprobe -r pata_via [ 227.560172] ata7.01: disabled [ 227.563668] pata_via 0000:04:00.0: PCI INT A disabled modprobe pata_via (different device enumeration) [ 260.320995] pata_via 0000:04:00.0: version 0.3.4 [ 260.321035] pata_via 0000:04:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17 [ 260.321142] pata_via 0000:04:00.0: setting latency timer to 64 [ 260.322064] scsi8 : pata_via [ 260.322663] scsi9 : pata_via [ 260.323093] ata9: PATA max UDMA/133 cmd 0xdc00 ctl 0xd880 bmdma 0xd400 irq 17 [ 260.323105] ata10: PATA max UDMA/133 cmd 0xd800 ctl 0xd480 bmdma 0xd408 irq 17 [ 260.608665] ata9.01: ATAPI: LITE-ON DVDRW SOHW-1693S, KS09, max UDMA/66 [ 260.624671] ata9.01: configured for UDMA/66 [ 260.626251] scsi 8:0:1:0: CD-ROM LITE-ON DVDRW SOHW-1693S KS09 PQ: 0 ANSI: 5 (hard crash) Regards, Giuliano Procida. -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". 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