Comment 1 for bug 75055

The kernel output is the the same as this:

[17179583.244000] ata1: SATA max UDMA/133 cmd 0xF883E100 ctl 0x0 bmdma 0x0 irq 209
[17179583.244000] ata2: SATA max UDMA/133 cmd 0xF883E180 ctl 0x0 bmdma 0x0 irq 209
[17179583.244000] ata3: SATA max UDMA/133 cmd 0xF883E200 ctl 0x0 bmdma 0x0 irq 209
[17179583.244000] ata4: SATA max UDMA/133 cmd 0xF883E280 ctl 0x0 bmdma 0x0 irq 209
[17179583.628000] ata1: SATA link up 3.0 Gbps (SStatus 113)
[17179583.628000] unexpected IRQ trap at vector a8
[17179613.628000] ata1: qc timeout (cmd 0xec)
[17179613.628000] ata1: dev 0 failed to IDENTIFY (I/O error)

There is a thread on the Ubuntu forum on the same problem.
Someone suggested the kernel parameter acpi=force irqpoll.

However the solution is not good. I get a lot of:
...
[17179583.628000] unexpected IRQ trap at vector a8
[17179583.628000] unexpected IRQ trap at vector a8
[17179583.628000] unexpected IRQ trap at vector a8
...
and something like: the drive seems confused

I just looked a the archlinux kernel config file and i found that they have msi disabled. I started ubuntu with pci=nomsi.
And the problem disappears.