I had Mandrake Linux 9.1 running fineon a Dell Optiplex PIII-550 Mhz. The system had a Mitsumi CDR-2801TEon hdc, running with SCSI over IDE emulation.

When the time came to upgrade toMandrake Linux 10.0 Final, I booted up CD1 and it loaded fine, untilthe stage where it tries to access the CD and mount it. At thispoint, the kernel halted with the following error:

Kernel BUG at drivers/ide/ide-ops.c:1005! ....<0> Kernel panic: Fatal exception in interuptIn interupt handler - not syncing" 

I did some investigation on the web, and found that several otherpeople on various forums and mailing lists complaining about the sameexact thing.

None of them had anyone reply with a solution.

• Google Groups 1
• Google Groups 2
• Google Groups 3
• Mandrake Bug Database: Installation fails immediately with a kernel panic (drivers/ide/ide-iops.c)
• Mandrake Forums
• Linux Questions
• Red Hat Bugzilla
• Linux Today
• LKML report

Upon further investigation, I found that this is not Mandrakespecific, nor is it 2.6.x specific. It was introduced along withchanges in IDE in 2.4.21pre4.

Here is what Alan Cox added these:

Linux 2.4.21pre4-ac2o Turn on use of ide_execute_command everywhere (Ross Biro, me)o First cut at settings locking for IDE  (me)Linux 2.4.21pre4-ac1o Finish the ide_execute_command code  (me)o Switch ide-cd to ide_execute_command   (me)

The offending code is in drivers/ide/ide-iops.c:

void ide_execute_command(ide_drive_t *drive, task_ioreg_t cmd, ide_handler_t *handler, unsigned timeout, ide_expiry_t *expiry){        unsigned long flags;        ide_hwgroup_t *hwgroup = HWGROUP(drive);        ide_hwif_t *hwif = HWIF(drive);        spin_lock_irqsave(&ide_lock, flags);        if(hwgroup->handler)                BUG();        hwgroup->handler        = handler;        hwgroup->expiry         = expiry;        hwgroup->timer.expires  = jiffies + timeout;        add_timer(&hwgroup->timer);        hwif->OUTBSYNC(drive, cmd, IDE_COMMAND_REG);        /* Drive takes 400nS to respond, we must avoid the IRQ being           serviced before that.           FIXME: we could skip this delay with care on non shared           devices        */        ndelay(400);        spin_unlock_irqrestore(&ide_lock, flags);}

Note that different kernel versions will report a different line number, but it is the same function.

No solution is feasible so far, short of swapping the drive. I ended up doing just that, after I sent an email to Jens Axboe, the maintainer of the IDE CD-ROMdrivers in the kernel on 2.6.x, but did not get an answer for severalweeks.

Like others have done, I solved the problem byreplacing the Mitsumi CD-R with a Ricoh CD-RW MP7040A . Worked thefirst time without a problem. I could proceed and install Mandrake10.0 normally. No other hardware modifications or BIOS or cabling atall.