Public bug reported:
After installing Feisty Herd 1 on an Intel motherboard model
BOXD102GGC2L, the onboard Realtek RTL-8139/8139C/8139C+ ethernet
controller is recognized and a network interface eth0 is provided.
However, when dhclient attempts to assign a dynamic IP address to the
interface, the following error appears in /var/log/syslog:
eth0: link down
irq 20: nobody cared (try booting with the "irqpoll" option)
[dump_trace+402/448] dump_trace+0x192/0x1c0
[show_trace_log_lvl+24/48] show_trace_log_lvl+0x18/0x30
[show_trace+15/32] show_trace+0xf/0x20
[dump_stack+21/32] dump_stack+0x15/0x20
[__report_bad_irq+36/128] __report_bad_irq+0x24/0x80
[note_interrupt+536/592] note_interrupt+0x218/0x250
[handle_fasteoi_irq+192/208] handle_fasteoi_irq+0xc0/0xd0
[do_IRQ+105/192] do_IRQ+0x69/0xc0
[common_interrupt+26/32] common_interrupt+0x1a/0x20
[phys_startup_32+-1210686939/-1073741824] 0xb7e66225
=======================
handlers:
[pg0+474102400/1068778496] (rtl8139_interrupt+0x0/0x480 [8139too])
Disabling IRQ #20
So, as mentionned in the error, I tried rebooting with the "irqpoll"
kernel option and the network interface worked!
** Affects: Ubuntu
Importance: Undecided
Status: Unconfirmed
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IRQ problem with RTL-8139/8139C/8139C+ ethernet controller
https://launchpad.net/bugs/77838
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