Boot: Too much work for irq 23

[Guest]

Hi all,
I installed Kubuntu 9.10 x64 on my desktop (based on ASUS P5B-E motherboard).
My system is very sloow at boot and the mouse and the keyboard are laggy for a few minutes. I noticed that calling dmesg i get a long list of

serial8250: too much work for irq23

here's the interrupts list:

~$ cat /proc/interrupts
      CPU0    CPU1
 0:     30     0  IO-APIC-edge   timer
 1:     2     0  IO-APIC-edge   i8042
 6:     5     0  IO-APIC-edge   floppy
 8:     1     0  IO-APIC-edge   rtc0
 9:     0     0  IO-APIC-fasteoi  acpi
 12:     4     0  IO-APIC-edge   i8042
 16:     0     0  IO-APIC-fasteoi  uhci_hcd:usb3
 17:     39     0  IO-APIC-fasteoi  uhci_hcd:usb4, HDA Intel
 18:     0     0  IO-APIC-fasteoi  ehci_hcd:usb1, uhci_hcd:usb7
 19:     0     0  IO-APIC-fasteoi  uhci_hcd:usb6
 22:    732     0  IO-APIC-fasteoi  HDA Intel
 23:   55187     0  IO-APIC-fasteoi  ehci_hcd:usb2, uhci_hcd:usb5
 27:   25439     0  PCI-MSI-edge   ahci
 28:    5804     0  PCI-MSI-edge   eth0
 29:     45     0  PCI-MSI-edge   fglrx[0]@PCI:1:0:0
NMI:     0     0  Non-maskable interrupts
LOC:   80145   99739  Local timer interrupts
SPU:     0     0  Spurious interrupts
CNT:     0     0  Performance counter interrupts
PND:     0     0  Performance pending work
RES:     96    3420  Rescheduling interrupts
CAL:    133    1285  Function call interrupts
TLB:    700    630  TLB shootdowns
TRM:     0     0  Thermal event interrupts
THR:     0     0  Threshold APIC interrupts
MCE:     0     0  Machine check exceptions
MCP:     5     5  Machine check polls
ERR:     1
MIS:     0

I disabled all non used onboard devices, such as serial, parallel, IEEE1394.
What can I do to solve the problem?

[verndog]

Re: Boot: Too much work for irq 23

Do you have anything plugged into the usb that uses irq23?

I don't have any reference to irq in dmesg. And small hits on that irq.

23: 60 0 IO-APIC-fasteoi ehci_hcd:usb1

[Snowhog]

Re: Boot: Too much work for irq 23

Try adding the irqpoll option to the end of the kernel line before booting. On the Grub menu, press 'e' and then highlight the kernel line and press 'e' to edit it. Move the cursor to the end of the line and type irqpoll and then follow the instructions at the bottom of the screen to continue to boot.

This is 'temporary' and does not change the grub.cfg file at all. If it fixes your issue, then the fix can be made permanent.