On 09/24/2013 02:52 AM, Michael Stolovitzsky wrote:
On Mon, Sep 23, 2013 at 10:13:49AM +0200, Arend van Spriel wrote:
On 09/22/2013 12:34 AM, Michael Stolovitzsky wrote:
Hi,
On 3.12-rc1, modprobe brcmsmac causes a soft lockup (trace #1), effectively killing the box. This is a Lenovo S206
with BCM4313 (14e4:4727), which I believe is a bluetooth combo board. After a while,
RCU scheduler code detects a lockup (trace #2).
This did not happen in 3.11.1, although brcmsmac hasn't worked on this machine
as far as I remember. In the previous kernels (~3.2.0+), it loads, but the
reception is extremely weak - you must be within few meters to the AP, and the card would
die after several minutes. The proprietary wl.ko driver works fine.
I've attached the dmesg output, the kernel configuration and the output of lspci -vnn.
I'm comfortable with experimenting; please let me know how I can help here.
A fix for this problem has been submitted to John. I think it is in
transit to mainline so probably will be in 3.12-rc2.
Here the URL of the patch:
https://git.kernel.org/cgit/linux/kernel/git/linville/wireless.git/patch/?id=aaa2ced15ad8dca8048666c9f70736424d696a6b
Arend, much thanks and an apology for not checking the patches. I will try this out ASAP.
Is the (presumedly) low RX gain also a known problem with brcmsmac on BCM4313?
The patch is in 3.12-rc2. There have been more reports on that, but it
still needs to be investigated. Can you provide content of
/sys/kernel/debug/brcmsmac/bcma*/hardware? You need to have
CONFIG_BRCMDBG selected.
Regards,
Arend
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