Re: Sierra Wireless MC7750 / MM 0.7.990 / NM 0.9.8

[Dan Williams <dcbw redhat com>]

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.  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
workaround)
net: qmi_wwan: fixup destination address (firmware bug workaround)
net: qmi_wwan: fixup missing ethernet header (firmware bug workaround)

Dan

> > On Wed, May 22, 2013 at 3:39 PM, Aleksander Morgado
> > <aleksander lanedo com <mailto:aleksander lanedo com>> wrote:
> >
> >     On 05/22/2013 06:26 AM, Heiher wrote:
> >     > Currently, I can connect to network and got the IPv4 address (from
> >     ISP)
> >     > of the network interface 'wwan0' by Networkmanager + ModemManager in
> >     > lastest Arch Linux, but ping any IP addresses (e.g. 8.8.8.8) always
> >     > reply 'timeout'.
> >     >
> >
> >     Is it connected to LTE this time?
> >
> >     --
> >     Aleksander
> >
> >
> >
> >
> > -- 
> > Best regards!
> > Heiher
> > https://heiher.info