On 29/06/14 19:31, Larry Finger wrote:
On 06/29/2014 12:15 PM, John Talbut wrote:
There seems to be a general problem when using a static kernel and
initramfs in
that the wireless drivers try to load firmware before the disks are
mounted and
the /lib/firmware folder is available. Various people seem to have
come across
problems with firmware not loading, some of which seem to relate to this
problem, which they have approached as if it is a problem with their
particular
driver. However it seems to be a general problem and I have had it
with three
different drivers.
There seems to be a number of possible approaches to this: loading the
firmware
in an initramfs; changing the sequence in which wireless drivers start
so that
they wait until the disks are mounted; compiling the firmware into the
kernel
and loading the firmware as part of ifup. I see that the latter has
been done
for one driver
(http://thread.gmane.org/gmane.linux.kernel.wireless.general/3390).
What is the current situation with this problem and what needs doing?
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What kernel version, and what wireless drivers have this problem?
At one point, there was a timeout of 30 seconds for request_firmware()
calls, and that led to problems even when the drivers were built as
modules. That situation was handled in a number of wireless drivers by
using request_firmware_nowait(); however, my understanding was that user
space was fixed to avoid the timeout. I think udev was the component
that changed. What version of that are you using?
Larry
I originally had the problem with a Broadcom BCM43225 wireless. This
was with a 3.8 kernel. This was solved by a patch to the kernel
brcmsmac driver and this is still working with a 3.14 kernel.
Currently I have the problem with an Intel Centrino Wireless-N 130. The
problem was present with a 3.11 kernel and currently with a 3.14 kernel.
udev version 204-5linuxmint.
A friend seems to have the problem with a Realtek 8129se wireless but we
are still checking out that this is the problem.
John
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