On 05/06/2010 10:16 AM, Jan Engelhardt wrote: > Hi, > > > I have here some typical windowscentric Dell laptop with a b43 chipset > that refuses to work due to something with DMA. > > lspci: > 08:00.0 Network controller: Broadcom Corporation BCM4312 802.11b/g (rev > 01) > 08:00.0 0280: 14e4:4315 (rev 01) > > I installed the firmware using one of opensuse's scripts > (install_bcm43xx_firmware, though it handles b43 and b43legacy according > to the script's inner comments), which retrieves > > wl_apsta_mimo.o from > mirror2.openwrt.org/sources/broadcom-wl-4.150.10.5.tar.bz2 > > and runs fwcutter on it. In dmesg, I then find on modprobe b43 > verbose=3: > > b43 ssb0:0: firmware: requesting b43/ucode15.fw > b43 ssb0:0: firmware: requesting b43/lp0initvals15.fw > b43 ssb0:0: firmware: requesting b43/lp0bsinitvals15.fw > b43-phy0: Loading firmware version 410.2160 (2007-05-26 15:32:10) > b43-phy0 debug: b2062: Using crystal tab entry 19200 kHz. > b43-phy0 debug: Chip initialized > b43-phy0 debug: 64-bit DMA initialized > b43-phy0 debug: QoS enabled > b43-phy0 debug: Wireless interface started > b43-phy0 debug: Adding Interface type 2 > b43-phy0 ERROR: Fatal DMA error: 0x400, 0x0, 0x0, 0x0, 0x0, 0x0 > b43-phy0 ERROR: This device does not support DMA on your system. Please > use PIO instead. > b43-phy0 ERROR: CONFIG_B43_FORCE_PIO must be set in your kernel > configuration. > ADDRCONF(NETDEV_UP): wlan0: link is not ready > > > So, can I get PIO mode for free without recompiling? (Since > CONFIG_B43_PIO=y already.) What other info needs to be provided to help > resolve this? > > System is a 2.6.33.2-x86_64. In the latest mainline kernel (2.6.34-rc6), the fallback to PIO is automatic. For a 2.6.33 kernel, you will need to rebuild the kernel or install the latest compat-wireless package. Your distro may already provide it. We are working on this problem. Keep watching this list for trial patches. Unfortunately, none of the developers have a machine that suffers from this problem. It seems to be associated with Intel processors (mostly netbooks with Atom chips) and the Phoenix BIOS. Larry -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
