From: Larry Finger <Larry.Finger@lwfinger.net>
To: b43-dev@lists.infradead.org
Subject: LP PHY Dell device not working properly with b43 even in PIO mode
Date: Thu, 10 Feb 2011 11:41:57 -0600 [thread overview]
Message-ID: <4D542365.6060307@lwfinger.net> (raw)
In-Reply-To: <20110210181642.760948f3@destiny.ordissimo>
On 02/10/2011 11:16 AM, Anisse Astier wrote:
> [ 103.627184] wlan0: associated
> [ 103.677583] b43-phy0 debug: Using hardware based encryption for keyidx: 0, mac: 68:7f:74:16:57:c9
> [ 148.586756] b43-phy0 ERROR: Fatal DMA error: 0x00000800, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000
> [ 148.586788] b43-phy0 ERROR: This device does not support DMA on your system. It will now be switched to PIO.
> [ 148.586791] b43-phy0: Controller RESET (DMA error) ...
> [ 148.586794] b43-phy0 ERROR: Fatal DMA error: 0x00000800, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000
> [ 148.586797] b43-phy0 ERROR: This device does not support DMA on your system. It will now be switched to PIO.
> [ 148.586800] b43-phy0: Controller RESET (DMA error) ...
> [ 148.586882] b43-phy0 debug: Wireless interface stopped
On some boxes, 14e4:4315 devices fail in b43 with with this DMA error. We don't
know why, nor do we know how to fix it. Unfortunately, none of the developers
have such a system, which makes the debugging harder.
I don't think the problem is with the Dell 1397, but with the motherboard on the
laptop. In fact, most of the problems have been with netbook computers with a
Phoenix BIOS. Does your system fit that description?
> [ 297.703041] b43-phy0 ERROR: MAC suspend failed
> [ 297.854043] b43-phy0 ERROR: MAC suspend failed
> [ 298.003042] b43-phy0 ERROR: MAC suspend failed
Are the MAC suspend failures in PIO mode a regression that recently appeared? I
cannot think of any changes that should have affected the LP PHY devices, but
anything is possible.
The only workaround I can suggest is to use wl. I hate to recommend
closed-source software, but there may be no alternative.
Larry
next prev parent reply other threads:[~2011-02-10 17:41 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-10 17:16 LP PHY Dell device not working properly with b43 even in PIO mode Anisse Astier
2011-02-10 17:41 ` Larry Finger [this message]
2011-02-10 18:30 ` Anisse Astier
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