Huawei E1552 disconnections

[Kalle Valo]

I have huawei E1552, lsusb after modeswitch:

Bus 001 Device 014: ID 12d1:1001 Huawei Technologies Co., Ltd. E620 USB Modem

In certain locations I see a lot of disconnections, the data
connection is just disconnected and I need to plug out and in the
modem to get it working again. This is with 0.36-0ubuntu0+ind1+r4091+201012121608.

I see this in certain locations, for example the place I'm in right
now disconnection happens within 30 minutes. Or if I'm on a car it
happens withing few minutes. But I don't see this at all in my home.
I'm guessing this has something to do with handover between base
stations.

The logs don't show anything obvious, just that ppp disconnection happens:

Dec 17 10:19:08 tukki ofonod[4318]: PCUI: < \r\n^DSFLOWRPT:00000120,0000B8D3,00006004,0000000000197B04,0000000000AB2D1E,0003E800,0007D000\r\n
Dec 17 10:19:10 tukki ofonod[4318]: plugins/udev.c:remove_modem() /devices/virtual/net/ppp0
Dec 17 10:19:10 tukki ofonod[4318]: PCUI: < \r\n^MODE:5,4\r\n\r\n^DSFLOWRPT:00000122,00007001,00025060,00000000001A5B06,0000000000AFCDDE,0003E800,0007D000\r\n\r\n^RSSI:21\r\n
Dec 17 10:19:10 tukki ofonod[4318]: drivers/atmodem/gprs-context.c:ppp_disconnect()
Dec 17 10:19:10 tukki ofonod[4318]: drivers/atmodem/gprs-context.c:at_gprs_activate_primary() cid 1
Dec 17 10:19:10 tukki ofonod[4318]: Modem: > AT+CGDCONT=1,"IP","internet"\r
Dec 17 10:19:12 tukki ofonod[4318]: PCUI: < \r\n^DSFLOWRPT:00000124,00000000,00000000,00000000001A5B06,0000000000AFCDDE,00000000,00000000\r\n
Dec 17 10:19:12 tukki ofonod[4318]: PCUI: < \r\n^MODE:5,5\r\n
Dec 17 10:19:13 tukki ofonod[4318]: PCUI: < \r\n^RSSI:21\r\n
Dec 17 10:19:14 tukki ofonod[4318]: PCUI: < \r\n^DSFLOWRPT:00000126,00000000,00000000,00000000001A5B06,0000000000AFCDDE,00000000,00000000\r\n
Dec 17 10:19:16 tukki ofonod[4318]: PCUI: < \r\n^DSFLOWRPT:00000128,00000000,00000000,00000000001A5B06,0000000000AFCDDE,00000000,00000000\r\n
Dec 17 10:19:16 tukki ofonod[4318]: PCUI: < \r\n^RSSI:21\r\n
Dec 17 10:19:17 tukki ofonod[4318]: PCUI: < \r\n^BOOT:38645652,0,0,0,87\r\n
Dec 17 10:19:18 tukki ofonod[4318]: PCUI: < \r\n^DSFLOWRPT:0000012A,00000000,00000000,00000000001A5B06,0000000000AFCDDE,00000000,00000000\r\n
Dec 17 10:19:19 tukki ofonod[4318]: PCUI: < \r\n^MODE:5,4\r\n
Dec 17 10:19:19 tukki ofonod[4318]: plugins/huawei.c:huawei_disconnect()
Dec 17 10:19:19 tukki ofonod[4318]: src/gprs.c:gprs_context_remove() atom: 0x111b6a0
Dec 17 10:19:19 tukki ofonod[4318]: drivers/atmodem/gprs-context.c:at_gprs_context_remove()
Dec 17 10:19:19 tukki ofonod[4318]: src/modem.c:get_modem_property() modem 0x1115e10 property Modem
Dec 17 10:19:19 tukki ofonod[4318]: plugins/huawei.c:open_device() Modem /dev/ttyUSB0
Dec 17 10:19:19 tukki ofonod[4318]: Reopened GPRS context channel

[Kalle Valo (kvalo)]

Upstream bug is here:

http://bugs.meego.com/show_bug.cgi?id=6944

And some patches here:

http://lists.ofono.org/pipermail/ofono/2011-January/007137.html
http://lists.ofono.org/pipermail/ofono/2011-January/007138.html

I haven't tried the patches yet.

[Kalle Valo (kvalo)]

I think these two commits should fix the issue:

http://git.kernel.org/?p=network/ofono/ofono.git;a=commit;h=694589f51dd77d7cdd0ec65638ad9a1279f546fe
http://git.kernel.org/?p=network/ofono/ofono.git;a=commit;h=ad16e81aff95c5fd3ab1c0c014aed62d49808ab3

They are (at least) in ofono daily build version 0.36-0ubuntu0+ind2+r4863+201102200331 or newer. I haven't tested this yet, though. Will report later.

[Mathieu Trudel-Lapierre (cyphermox)]

Moving to package; this bug will need to be re-triaged to confirm and open upstream.

[Mathieu Trudel-Lapierre (cyphermox)]

This appears to be marked as Fixed upstream, so should be re-tested in Precise and closed as Fix Released if it can't be reproduced.

[Tony Espy (awe)]

Updated priority to Low based on the age of the bug and the fact that it's not important to either Touch or the default desktop version of Ubuntu.