On Friday 25 April 2008 17:21:00 Richard Jonsson wrote:
> I use a custom kernel, but I think I turned off b43/ssb debugging some 
> time ago. Anyway dmesg is drowning in this:

Oh, finally something useful. Great!

> [ 7389.533848] b43-phy0 warning: You must go to 
> http://linuxwireless.org/en/users/Drivers/b43#devicefirmware and 
> download the latest firmware (version 4).
> [ 7390.282233] PM: Adding info for No Bus:hw_random
> [ 7390.993977] PM: Removing info for No Bus:hw_random
> [ 7391.193935] b43-phy0: Loading firmware version 351.126 (2006-07-29 
> 05:54:02)
> [ 7391.193947] b43-phy0 warning: You are using an old firmware image. 
> Support for old firmware will be removed in July 2008.
> [ 7391.193953] b43-phy0 warning: You must go to 
> http://linuxwireless.org/en/users/Drivers/b43#devicefirmware and 
> download the latest firmware (version 4).
> [ 7392.151174] PM: Adding info for No Bus:hw_random
> [ 7518.285906] PM: Removing info for No Bus:hw_random
> [ 7518.485886] b43-phy0: Loading firmware version 351.126 (2006-07-29 
> 05:54:02)
> [ 7518.485898] b43-phy0 warning: You are using an old firmware image. 
> Support for old firmware will be removed in July 2008.
> [ 7518.485904] b43-phy0 warning: You must go to 
> http://linuxwireless.org/en/users/Drivers/b43#devicefirmware and 
> download the latest firmware (version 4).
> [ 7519.254126] PM: Adding info for No Bus:hw_random
> [ 7519.254195] printk: 2250 messages suppressed.
> [ 7519.254200] b43-phy0 ERROR: PHY transmission error
> [ 7519.254255] b43-phy0 ERROR: PHY transmission error
> [ 7519.254266] b43-phy0 ERROR: PHY transmission error
> [ 7519.254275] b43-phy0 ERROR: PHY transmission error
> [ 7519.254285] b43-phy0 ERROR: PHY transmission error
> [ 7519.254295] b43-phy0 ERROR: PHY transmission error
> [ 7519.254304] b43-phy0 ERROR: PHY transmission error
> [ 7519.254313] b43-phy0 ERROR: PHY transmission error
> [ 7519.254323] b43-phy0 ERROR: PHY transmission error
> [ 7519.254332] b43-phy0 ERROR: PHY transmission error
> [ 7519.294071] b43-phy0: Radio hardware status changed to DISABLED
> [ 7519.294131] PM: Removing info for No Bus:hw_random
> [ 7519.493955] b43-phy0: Loading firmware version 351.126 (2006-07-29 
> 05:54:02)
> [ 7519.493968] b43-phy0 warning: You are using an old firmware image. 
> Support for old firmware will be removed in July 2008.
> [ 7519.493973] b43-phy0 warning: You must go to 
> http://linuxwireless.org/en/users/Drivers/b43#devicefirmware and 
> download the latest firmware (version 4).
> [ 7520.230371] PM: Adding info for No Bus:hw_random
> [ 7520.974090] PM: Removing info for No Bus:hw_random
> [ 7521.174058] b43-phy0: Loading firmware version 351.126 (2006-07-29 
> 05:54:02)
> [ 7521.174069] b43-phy0 warning: You are using an old firmware image. 
> Support for old firmware will be removed in July 2008.
> [ 7521.174074] b43-phy0 warning: You must go to 
> http://linuxwireless.org/en/users/Drivers/b43#devicefirmware and 
> download the latest firmware (version 4).
> [ 7522.058469] PM: Adding info for No Bus:hw_random
> [ 7648.318039] PM: Removing info for No Bus:hw_random
> [ 7648.518013] b43-phy0: Loading firmware version 351.126 (2006-07-29 
> 05:54:02)
> [ 7648.518025] b43-phy0 warning: You are using an old firmware image. 
> Support for old firmware will be removed in July 2008.
> [ 7648.518030] b43-phy0 warning: You must go to 
> http://linuxwireless.org/en/users/Drivers/b43#devicefirmware and 
> download the latest firmware (version 4).
> [ 7649.266421] PM: Adding info for No Bus:hw_random
> [ 7649.306162] printk: 2287 messages suppressed.
> [ 7649.306170] b43-phy0 ERROR: PHY transmission error
> [ 7649.410123] b43-phy0: Radio hardware status changed to DISABLED
> [ 7650.006181] PM: Removing info for No Bus:hw_random
> [ 7650.206122] b43-phy0: Loading firmware version 351.126 (2006-07-29 
> 05:54:02)
> [ 7650.206133] b43-phy0 warning: You are using an old firmware image. 
> Support for old firmware will be removed in July 2008.
> [ 7650.206138] b43-phy0 warning: You must go to 
> http://linuxwireless.org/en/users/Drivers/b43#devicefirmware and 
> download the latest firmware (version 4).
> [ 7651.110535] PM: Adding info for No Bus:hw_random
> [ 7651.122202] b43-phy0: Radio hardware status changed to DISABLED

The device is throwing too many PHY errors and the driver decides to restart it.
What does happen when you press rfkill?

-- 
Greetings Michael.
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