Description of problem: Spurious events relating to JMicron controller. 03:00.0 SATA controller: JMicron Technologies, Inc. JMicron 20360/20363 AHCI Controller (rev 03) 03:00.1 IDE interface: JMicron Technologies, Inc. JMicron 20360/20363 AHCI Controller (rev 03) ata7: exception Emask 0x10 SAct 0x0 SErr 0x4000000 action 0xa frozen ata7: irq_stat 0x00000040, connection status changed ata7: SError: { DevExch } ata7: hard resetting link ata7: SATA link down (SStatus 0 SControl 300) ata7: EH complete ata7 and ata8 are the 2 sata ports on the JMicron controller, but neither have a drive connected. ata9 is the PATA port with a CDROM drive connected. Does not matter if JMicron controller is configured to AHCI or IDE in bios. dmesg shows these events being generated on ata7 at 5-8 second intervals. Version-Release number of selected component (if applicable): kernel-2.6.24.5-85.fc8.x86_64
I doubt the hardware is making them up. That would suggest power or signalling problems not software.
alan, I'd be inclined to agree with you, but with a bit more digging I notice that this is also being reported by other users using Ubuntu with a 2.6.24 kernel. See https://bugs.launchpad.net/ubuntu/+bug/198871 P.S. I'm 99.9% sure that this is not a power supply issue. Signalling - I'm not sure what you mean. There are no drives connected to the JMicron SATA ports.
No drives so that implies a sata funny in the AHCI code or Jmicron chip. No immediate ideas on the SATA side so I've reassigned the bug to the sata wizard
This problem seems to be resolved since upgrade to kernel-2.6.24.7-92.fc8.x86_64
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