Sergey Spiridonov <sena@xxxxxxxxxxxxxxxxx> writes: > I got a replacement motherboard. And I got absolutely same errors and > problems. FWIW I have an MSI (P45 Neo2) mobo with JMB363 (only PATA connected) and its second AHCI port (ata8, not connected) gives me the following. The 2.6.26.2 kernel doesn't see any problem: Linux version 2.6.26.2 (gcc version 4.3.0 20080428 (Red Hat 4.3.0-8) SMP ata7: SATA max UDMA/133 abar m8192@0xfeafe000 port 0xfeafe100 irq 16 ata8: SATA max UDMA/133 abar m8192@0xfeafe000 port 0xfeafe180 irq 16 ata7: SATA link down (SStatus 0 SControl 300) ata8: SATA link down (SStatus 0 SControl 300) ata9: PATA max UDMA/100 cmd 0xdc00 ctl 0xd880 bmdma 0xd400 irq 17 ata10: PATA max UDMA/100 cmd 0xd800 ctl 0xd480 bmdma 0xd408 irq 17 ata9.00: ATAPI: _NEC DVD_RW ND-4550A, 1.09, max UDMA/33 ata9.00: configured for UDMA/33 Now with 2.6.26.3: ata7: SATA max UDMA/133 abar m8192@0xfeafe000 port 0xfeafe100 irq 16 ata8: SATA max UDMA/133 abar m8192@0xfeafe000 port 0xfeafe180 irq 16 ata7: SATA link down (SStatus 0 SControl 300) ata8: SATA link down (SStatus 0 SControl 300) ata9: PATA max UDMA/100 cmd 0xdc00 ctl 0xd880 bmdma 0xd400 irq 17 ata10: PATA max UDMA/100 cmd 0xd800 ctl 0xd480 bmdma 0xd408 irq 17 ata9.00: ATAPI: _NEC DVD_RW ND-4550A, 1.09, max UDMA/33 ata9.00: configured for UDMA/33 ata8: exception Emask 0x10 SAct 0x0 SErr 0x4000000 action 0xe frozen ata8: irq_stat 0x00000040, connection status changed ata8: SError: { DevExch } ata8: hard resetting link ata8: SATA link down (SStatus 0 SControl 300) ata8: EH complete ata8: exception Emask 0x10 SAct 0x0 SErr 0x4000000 action 0xe frozen ata8: irq_stat 0x00000040, connection status changed ata8: SError: { DevExch } ata8: hard resetting link ata8: SATA link down (SStatus 0 SControl 300) ata8: EH complete ata8: exception Emask 0x10 SAct 0x0 SErr 0x4000000 action 0xe frozen ata8: irq_stat 0x00000040, connection status changed ata8: SError: { DevExch } ata8: hard resetting link ... .config differences which could somehow be relevant(?): -CONFIG_GART_IOMMU=y -CONFIG_K8_NB=y -CONFIG_AGP_AMD64=y (I'm using SWIOTLB in both cases, it's P45/Core2 duo based machine). Can't see anything between 2.6.26.2 and 2.6.26.3 which could cause that. Perhaps I should bisect it anyway? For now I have just disabled these AHCI devices, didn't know that it was ok with 2.6.26.2 (just noticed it in the logs). Will look at it. -- Krzysztof Halasa -- 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