Snapdragon X55 (Thinkpad X1 Nano w/5G Modem)

Mon May 24 17:21:24 UTC 2021

Replying to myself here again..

Not sure what's going on but noticed laptop running hot and I see
ModemManager + mbim-proxy running at 100% cpu.
Strace  of mbim-proxy only spams infinite lines like:
write(7,
"\3\0\0\0000\0\0\0\237\3\0\0\1\0\0\0\0\0\0\0\242\211\3143\274\273\213O\266\260\23>\302\252\346\337\24\0\0\0\0\0\0\0\0\0\0\0",
48) = -1 EAGAIN (Resource temporarily unavailable)
write(7,
"\3\0\0\0000\0\0\0\237\3\0\0\1\0\0\0\0\0\0\0\242\211\3143\274\273\213O\266\260\23>\302\252\346\337\24\0\0\0\0\0\0\0\0\0\0\0",
48) = -1 EAGAIN (Resource temporarily unavailable)
write(7,
"\3\0\0\0000\0\0\0\237\3\0\0\1\0\0\0\0\0\0\0\242\211\3143\274\273\213O\266\260\23>\302\252\346\337\24\0\0\0\0\0\0\0\0\0\0\0",
48) = -1 EAGAIN (Resource temporarily unavailable)
write(7,
"\3\0\0\0000\0\0\0\237\3\0\0\1\0\0\0\0\0\0\0\242\211\3143\274\273\213O\266\260\23>\302\252\346\337\24\0\0\0\0\0\0\0\0\0\0\0",
48) = -1 EAGAIN (Resource temporarily unavailable)

mbim-proxy:
oskar at oskar-ThinkPad-X1-Nano-Gen-1:~$ sudo ls -la /proc/2275/fd/7
lrwx------ 1 root root 64 May 24 04:59 /proc/2275/fd/7 -> /dev/wwan0p2MBIM

So it's trying to write to wwanop2MIM

strace ModemManager only seems to spam infinite lines like:
write(11,
"\3\0\0\0000\0\0\0+\2\0\0\1\0\0\0\0\0\0\0\242\211\3143\274\273\213O\266\260\23>"...,
48) = -1 EAGAIN (Resource temporarily unavailable)
write(11,
"\3\0\0\0000\0\0\0+\2\0\0\1\0\0\0\0\0\0\0\242\211\3143\274\273\213O\266\260\23>"...,
48) = -1 EAGAIN (Resource temporarily unavailable)
write(11,
"\3\0\0\0000\0\0\0+\2\0\0\1\0\0\0\0\0\0\0\242\211\3143\274\273\213O\266\260\23>"...,
48) = -1 EAGAIN (Resource temporarily unavailable)
write(11,
"\3\0\0\0000\0\0\0+\2\0\0\1\0\0\0\0\0\0\0\242\211\3143\274\273\213O\266\260\23>"...,
48) = -1 EAGAIN (Resource temporarily unavailable)
write(11,
"\3\0\0\0000\0\0\0+\2\0\0\1\0\0\0\0\0\0\0\242\211\3143\274\273\213O\266\260\23>"...,
48) = -1 EAGAIN (Resource temporarily unavailable)
write(11,
"\3\0\0\0000\0\0\0+\2\0\0\1\0\0\0\0\0\0\0\242\211\3143\274\273\213O\266\260\23>"...,
48) = -1 EAGAIN (Resource temporarily unavailable)
write(11,
"\3\0\0\0000\0\0\0+\2\0\0\1\0\0\0\0\0\0\0\242\211\3143\274\273\213O\266\260\23>"...,
48) = -1 EAGAIN (Resource temporarily unavailable)

ModemManager:
oskar at oskar-ThinkPad-X1-Nano-Gen-1:~$ sudo ls /proc/1363/fd/11 -la
lrwx------ 1 root root 64 May 24 19:16 /proc/1363/fd/11 -> 'socket:[236731]'

Any ideas?

/Oskar

On Thu, 20 May 2021 at 15:30, Oskar Stenman <oskar at cetex.se> wrote:

> Hi!
>
> I've tested it. ModemManager doesn't automatically activate it, hence the
> relatively large ModemManager log (NetworkManager is spamming
> activations).. But activating with qmicli works (although now with the new
> command).
>
> $ qmicli -p -d /dev/wwan0p2MBIM --device-open-mbim
> --dms-foxconn-set-fcc-authentication=00
> [20 May 2021, 15:22:51] -Warning ** [/dev/wwan0p2MBIM] couldn't detect
> transport type of port: couldn't detect device driver
> [20 May 2021, 15:22:51] -Warning ** [/dev/wwan0p2MBIM] requested MBIM mode
> but unexpected transport type found
> [/dev/wwan0p2MBIM] Successfully run Foxconn FCC authentication
>
> I didn't check version before recompiling, but the binary is reporting as
> 1.17.1.
> $ ModemManager --version
> ModemManager 1.17.1
> ...
> oskar at oskar-ThinkPad-X1-Nano-Gen-1:~$ which ModemManager
> /usr/local/sbin/ModemManager
> oskar at oskar-ThinkPad-X1-Nano-Gen-1:~$ ls -la /usr/local/sbin/ModemManager
> -rwxr-xr-x 1 root root 7781472 May 20 14:55 /usr/local/sbin/ModemManager
> oskar at oskar-ThinkPad-X1-Nano-Gen-1:~$ ps axu | grep ModemManager
> root        1081  0.3  0.0 317800 15356 ?        Ssl  15:22   0:01
> /usr/local/sbin/ModemManager --log-level DEBUG
>
> So seems like the correct / newest version is running.
>
> /Oskar Stenman
>
> On Wed, 19 May 2021 at 15:49, Aleksander Morgado <aleksander at aleksander.es>
> wrote:
>
>> Hey Oskar
>>
>> On Wed, May 12, 2021 at 9:38 AM Aleksander Morgado
>> <aleksander at aleksander.es> wrote:
>> >
>> > > > After that i could run:
>> > > > $ sudo qmicli -p -d /dev/wwan0p2MBIM --device-open-mbim
>> > > > --dms-dell-cuskit-unlock=00
>> > > > [11 maj 2021, 23:42:36] -Warning ** [/dev/wwan0p2MBIM] couldn't
>> detect
>> > > > transport type of port: couldn't detect device driver
>> > > > [11 maj 2021, 23:42:36] -Warning ** [/dev/wwan0p2MBIM] requested
>> MBIM mode
>> > > > but unexpected transport type found
>> > > > [/dev/wwan0p2MBIM] Successfully run Dell cuskit unlock
>> > > >
>> > > > I've attached the log from ModemManager and i can see a ton of stuff
>> > > > happening after i send that command with cuskit,
>> > >
>> > >
>> > > Coool!  So that actually worked.  Have to talk to my boss about
>> getting
>> > > a new laptop, then :-)
>> > >
>> > >
>> > > Not sure why you get those QMI indications, but anyway - this is good:
>> > >
>> > >
>> <<<<<< QMUX:
>> > >
>> <<<<<<   length  = 43
>> > >
>> <<<<<<   flags   = 0x80
>> > >
>> <<<<<<   service = "nas"
>> > >
>> <<<<<<   client  = 4
>> > >
>> <<<<<< QMI:
>> > >
>> <<<<<<   flags       = "indication"
>> > >
>> <<<<<<   transaction = 11
>> > >
>> <<<<<<   tlv_length  = 31
>> > >
>> <<<<<<   message     = "Serving System" (0x0024)
>> > >
>> <<<<<< TLV:
>> > >
>> <<<<<<   type       = "Serving System" (0x01)
>> > >
>> <<<<<<   length     = 6
>> > >
>> <<<<<<   value      = 01:01:01:02:01:08
>> > >
>> <<<<<<   translated = [ registration_state = 'registered' cs_attach_state =
>> 'attached' ps_attach_state = 'attached' selected_network = '3gpp'
>> radio_interfaces = '{ [0] = 'lte '}' ]
>> > >
>> > >
>> >
>> > Hahaha! :D That was a truly truly long shot. RF is now on, hopefully
>> > the connection will go on without issues as well.
>> >
>> > Time to add built-in support for this in libqmi+MM, maybe naming the
>> > message differently (foxconn fcc unlock?)
>> >
>>
>> Completely untested; could you give libqmi git master plus this
>> ModemManager branch a try?
>>
>> https://gitlab.freedesktop.org/mobile-broadband/ModemManager/-/merge_requests/534
>> If you could gather debug logs it would be great.
>>
>> --
>> Aleksander
>> https://aleksander.es
>>
>
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