Re: Sierra Wireless MC7750 / MM 0.7.990 / NM 0.9.8

Dan Williams <dcbw redhat com> writes:
On Wed, 2013-05-22 at 14:58 +0200, Aleksander Morgado wrote:
On 05/22/2013 01:42 PM, Heiher wrote:
It's connect to EVDO (China Telecom).

Now, It works very well by legacy PPP mode (disable QMI, sudo modprobe
-r qmi-wwan). It's kernel bug?

Well, it should better work in QMI mode if possible. If the connection
worked in LTE using QMI but you still were not able to ping any IP
address, it may have been a known kernel issue.

Yeah, I'll bet this is the kernel issue that Bjorn fixed to work around
various quirks that QMI has.

Yes, could very well be.  The "DHCP works, but cannot ping" sounds just
like the missing ethernet header problem.

 The patches are in the 3.9 kernel, and
have been backported to the stable 3.4.46 kernel as well.  I'm not sure
about the status for other "stable" kernel versions.

The patches are:

net: qmi_wwan: prevent duplicate mac address on link (firmware bug
net: qmi_wwan: fixup destination address (firmware bug workaround)
net: qmi_wwan: fixup missing ethernet header (firmware bug workaround)

They are currently in the v3.5 queue:;a=history;f=drivers/net/usb/qmi_wwan.c;hb=linux-3.5.y-queue

Doesn't look like they are in the v3.8 longterm queue just yet, but I
assume they will be.


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