Messages in this thread | | | Subject | kernel hang, spurious 8259A interrupt: IRQ7 | From | Jim McCloskey <> | Date | Sat, 12 Oct 2002 12:30:56 -0700 |
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I have had the `problem', discussed extensively here and in other places, of the message:
spurious 8259A interrupt: IRQ7
appearing on the console, at boot time regularly and at other times occasionally. This is with 2.4.18, with APIC enabled (more details below).
The many discussions of this issue that I've read usually conclude that it is a harmless nuisance rather than a problem.
Twice in the past year, though, I have had the system hang at the point in the boot-process where the system printer daemon is started (lprng in this case). At boot time, the spurious interrupt message appears just before this part of the process:
Oct 12 09:54:15 toraigh kernel: spurious 8259A interrupt: IRQ7. Oct 12 09:54:16 toraigh kernel: parport0: PC-style at 0x378 [PCSPP(,...)] Oct 12 09:54:16 toraigh kernel: parport_pc: Via 686A parallel port: io=0x378 Oct 12 09:54:16 toraigh kernel: lp0: using parport0 (polling). Oct 12 09:54:16 toraigh kernel: lp0: compatibility mode
Since, if I understand correctly, the parallel port interrupt is standardly at IRQ7, I was curious whether the hang might be connected in some way with IRQ handling or with whatever lies behind the `spurious interrupt' message.
In both cases the machine would not respond to keyboard input of any kind and I had to hit the reset button. I had to run fsck manually to fix inconsistencies on the root partition (/dev/sda1), but once that was done, the system re-booted normally.
I would be very grateful indeed for any advice or pointers. I reboot frequently (energy conservation) and the system-hang is a little frightening.
Jim
---------------------------------------------------------------------- kernel: Linux version 2.4.18 (root@toraigh) (gcc version 2.95.4 20011002 (Debian prerelease)) #1 Sun Aug 4 18:11:44 PDT 2002
CONFIG_X86_GOOD_APIC=y CONFIG_X86_UP_APIC=y # CONFIG_X86_UP_IOAPIC is not set CONFIG_X86_LOCAL_APIC=y
Mainboard: Tyan Trinity K7 S2380 CPU: AMD Athlon K7 750MHz SCSI HBA: Tekram DC390U2W PCI Ultra2W LVD-SCSI HBA Boot HD: Seagate 9.1GB LVD ST39236LW Ethernet Card: KTI KF-221TX/2 Graphics: Matrox G400 16MB SGRAM AGP Sound card: Creative Ensoniq AudioPCI
/proc/interrupts:
CPU0 0: 831752 XT-PIC timer 1: 16493 XT-PIC keyboard 2: 0 XT-PIC cascade 3: 222989 XT-PIC serial 10: 0 XT-PIC es1371 11: 7 XT-PIC eth0 12: 93259 XT-PIC PS/2 Mouse 15: 33434 XT-PIC sym53c8xx NMI: 0 LOC: 831722 ERR: 158 ----------------------------------------------------------------------
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