same here, while trying to test karmic alpha 5.
On a toshiba satellite P300-1HO, wifi doesn't work. and neither does wired 
ethernet.

ifconfig just shows the loopback device.

lscpi:
02:00.0 Network controller: Intel Corporation Wireless WiFi Link 5100
03:00.0 Ethernet controller: Marvell Technology Group Ltd. 88E8040T PCI-E Fast 
Ethernet Controller (rev 12)

kern.log:
[    6.375094] iwlagn: Intel(R) Wireless WiFi Link AGN driver for Linux, 1.3.27k
[    6.375096] iwlagn: Copyright(c) 2003-2009 Intel Corporation
[    6.375310] iwlagn 0000:02:00.0: enabling device (0000 -> 0002)
[    6.375319] iwlagn 0000:02:00.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
[    6.375331] iwlagn 0000:02:00.0: setting latency timer to 64
[    6.375350] iwlagn 0000:02:00.0: Detected Intel Wireless WiFi Link 5100AGN 
REV=0xF7FF7BF2
...messages about cfg80211 regulatory domain ...
[    6.527064] iwlagn 0000:02:00.0: Failed, HW not ready
[    6.527079] iwlagn 0000:02:00.0: PCI INT A disabled
[    6.633462]   alloc irq_desc for 22 on node 0
[    6.633465]   alloc kstat_irqs on node 0

and I also get (repeated many hundreds of times, every ~15ms):
iwlagn 0000:02:00.0: MAC is in deep sleep!.  CSR_GP_CNTRL = 0xCD5DFEAE

with at the end:
iwlagn 0000:02:00.0: Failed to init APMG
iwlagn 0000:02:00.0: PCI INT A disabled
iwlagn: probe of 0000:02:00.0 failed with error -110


And moreover the wired ethernet device doesn't show up either, but I
don't see related messages in the logs. (But I have to investigate
further.)

it's with the x64 kernel.

works fine with jaunty, kernel 2.6.28-15.

-- 
internet connection doesn't work (wifi+ethernet)
https://bugs.launchpad.net/bugs/418933
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