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    SubjectRe: [2.6.12rc4] PROBLEM: "drive appears confused" and "irq 18: nobody cared!"
    Alexander Fieroch <> wrote:
    > Problem 1:
    > while booting the message "hdb: cdrom_pc_intr: The drive appears
    > confused (ireason = 0x01)" repeats several times and the system hangs
    > for some seconds. After booting sometimes I get the same message and
    > linux hangs.
    > Problem 2:
    > syslog message "irq 18: nobody cared!" followed by a call trace repeats
    > while booting and while running linux.
    > On the bottom of this mail you'll find an extract of /var/log/syslog
    > showing this error.
    > My system is a P4 630 with em64t, ASUS P5GD2 Premium board (ICH6
    > chipset) and nvidia 6600GT PCIe graphic card.
    > I'm running a self compiled kernel 2.6.12rc4 but I've had these bugs in
    > self compiled kernel and default debian kernel
    > 2.6.11-9-em64t-p4-smp too.
    > The default debian kernel 2.6.8-11-em64t-p4-smp seems to be the only one
    > where problem 1 does not occur but problem 2 does.

    Does the thing work correctly under any versions of Linux? If so, which?

    It appears that you entered cdrom_pc_intr() with IDE_IREASON_REG = 0x01.

    * ATAPI Interrupt Reason Register.
    * cod : Information transferred is command (1) or data (0)
    * io : The device requests us to read (1) or write (0)

    io = 0
    cod = 1

    I'm not sure what this means. It generated an interrupt, expecting the
    kernel to send a write command? That sounds odd.

    If the answer to my first queston is "no" then perhaps the hardware is
    busted. Try swapping out cables, check power supplies, try a different
    drive, etc.

    If none of that helps then perhaps there's something we can do in
    cdrom_pc_intr() to work around this?

    (Should cdrom_pc_intr() be using atapi_ireason_t?)

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      Last update: 2005-05-28 02:19    [W:2.968 / U:0.060 seconds]
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