Hi,

Using the 2.6.23.1 kernel and Debian Etch on a Lenovo Thinkpad T61
7659A21, I am getting two weird errors, as follows:

        ata1.00: exception Emask 0x2 SAct 0x1c SErr 0x0 action 0x2 frozen
        ata1.00: spurious completions during NCQ issue=0x0 SAct=0x1c FIS=005040a1:00000002
        ata1.00: cmd 60/17:10:28:01:00/00:00:00:00:00/40 tag 2 cdb 0x0 data 11776 in
                 res 50/00:30:bf:01:00/00:00:00:00:00/40 Emask 0x2 (HSM violation)
        ata1.00: cmd 60/80:18:3f:01:00/00:00:00:00:00/40 tag 3 cdb 0x0 data 65536 in
                 res 50/00:30:bf:01:00/00:00:00:00:00/40 Emask 0x2 (HSM violation)
        ata1.00: cmd 60/30:20:bf:01:00/00:00:00:00:00/40 tag 4 cdb 0x0 data 24576 in
                 res 50/00:30:bf:01:00/00:00:00:00:00/40 Emask 0x2 (HSM violation)
        
        ...

        irq 19: nobody cared (try booting with the "irqpoll" option)
        
        Call Trace:
         <IRQ>  [<ffffffff80269f4e>] __report_bad_irq+0x1e/0x80
         [<ffffffff8026a24d>] note_interrupt+0x29d/0x2e0
         [<ffffffff8026adbd>] handle_fasteoi_irq+0xdd/0x110
         [<ffffffff8020d3cc>] call_softirq+0x1c/0x30
         [<ffffffff8020f44b>] do_IRQ+0x7b/0x100
         [<ffffffff8020c751>] ret_from_intr+0x0/0xa
         <EOI> 
        handlers:
        [<ffffffff8049e5f0>] (usb_hcd_irq+0x0/0x60)
        Disabling IRQ #19

I have tried booting with the irqpoll option, but this results in the
automounter doing weird things with the optical drive. Specifically, it
sporadically mounts an audio disc with weird negative-sized tracks, even
if there is no disc inserted in the drive.

Also, regardless of whether I boot with irqpoll or not, chrony
frequently uses up 100% of one CPU. The chrony measurements.log,
statistics.log and tracking.log all show normal activity (ie: a "normal"
volume of entries, vis a vis chrony on other machines where CPU usage is
normal). I don't know if this is related.

Any clues? I have attached the following:

1. Kernel configuration
2. dmesg output
3. lspci output
4. chrony.conf (if it matters)

Please cc me with replies, as I am not on the list. Thank you very much.

Cheers!

-- 
Federico Sevilla III
F S 3 Consulting Inc.
http://www.fs3.ph