Re: BCM4312 Fails when xdm is started

Michael Buesch
2008-11-21T17:42:50Z

On Friday 21 November 2008 17:25:22 Larry Finger wrote:
> A problem was recently posted to the bcm43xx mailing list that I am unable to
> solve. The machine in question is an HP Mini 2133 (HP product number FU346EA)
> with a BCM4312 PCIe wireless card. This card is known to work with the b43
> driver (I have one.) and it does work on this machine - at least initially.
>
> A problem occurs when xdm/kde is started. Suddenly a read operation on device
> hardware returns all ones as though the register does not exist, or if it were
> suddenly mismapped. If the OP doesn't try to run xdm, the same problem will
> eventually occur, it just takes longer.

Can you dump PCI config space and SSB registers (TMSLOW, maybe others, too).
It looks like a random bus write disabled the device.

> [ 0.000000] Zone PFN ranges:
> [ 0.000000] DMA 0x00000000 -> 0x00001000
> [ 0.000000] Normal 0x00001000 -> 0x000373fe
> [ 0.000000] HighMem 0x000373fe -> 0x0006feb0
>
> On my 64-bit HP machine, I see:
>
> Zone PFN ranges:
> DMA 0x00000000 -> 0x00001000
> DMA32 0x00001000 -> 0x00100000
> Normal 0x00100000 -> 0x00100000
>
> Is it "normal" for there not to be a DMA32 range with a 32-bit version of Linux?

Yeah, I think so.

--
Greetings Michael.