| Summary: | Sierra Mobile Broadband EM7455 does not work. | ||
|---|---|---|---|
| Product: | libmbim | Reporter: | Kai-Heng Feng <kai.heng.feng> |
| Component: | General | Assignee: | Aleksander Morgado <aleksander> |
| Status: | RESOLVED FIXED | QA Contact: | |
| Severity: | normal | ||
| Priority: | medium | CC: | aleksander, fourdollars |
| Version: | unspecified | ||
| Hardware: | x86-64 (AMD64) | ||
| OS: | Linux (All) | ||
| Whiteboard: | |||
| i915 platform: | i915 features: | ||
| Attachments: |
Debug message from ModemManager.
Message from mbimcli. Log file from mbim-proxy. Log file from mbim-proxy. Increase the retry interval to 5 seconds. Increase the retry interval to 5 seconds. |
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Created attachment 116876 [details]
Message from mbimcli.
Looks like the mbim-proxy cannot get the MBIM port open. Could you run the following sequence? [stop ModemManager] $ sudo /usr/libexec/mbim-proxy --verbose > proxy.log 2>&1 & $ sudo /usr/sbin/ModemManager --debug And send back the proxy log? Created attachment 116969 [details]
Log file from mbim-proxy.
(In reply to Kai-Heng Feng from comment #3) > Created attachment 116969 [details] > Log file from mbim-proxy. Looks like the proxy didn't receive anything. Was ModemManager run *after* running the proxy? Created attachment 116971 [details]
Log file from mbim-proxy.
Yes. There was already a ModemManager instance running. Here's the correct log.
(In reply to Kai-Heng Feng from comment #5) > Created attachment 116971 [details] > Log file from mbim-proxy. > > Yes. There was already a ModemManager instance running. Here's the correct > log. Thanks. Pretty weird, the modem doesn't seem to ever reply to any MBIM message... Is there any chance that cdc_mbim kernel module does not support this card? Now I can make the device work by changing the retry timer from 1s to 4s in mbim_device_command(): http://cgit.freedesktop.org/libmbim/libmbim/tree/src/libmbim-glib/mbim-device.c#n1234 After changing that, the device can operate normally. So looks like it may be a driver/firmware/hardware problem. Created attachment 118426 [details] [review] Increase the retry interval to 5 seconds. Comment on attachment 118426 [details] [review] Increase the retry interval to 5 seconds. This breaks the timeout value given by the user. In open_message_ready() we'll do a ctx->timeout--; if we got a timeout error, so that we can retry. Instead of ctx->timeout--; there should be a ctx->timeout-=5 there, and along with that: make timeout a gint (not guint) and also don't do the (ctx->timeout) check, and instead do (ctx->timeout > 0) Also, better #define RETRY_TIMEOUT_SECS 5 and use the symbol everywhere. Could you update the patch and retest? Created attachment 118427 [details] [review] Increase the retry interval to 5 seconds. Sure. I have verified the patch of comment #11. It works fine and is better than the previous one. Merged the patch to mbim-1-12 and git master, thanks! |
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Created attachment 116875 [details] Debug message from ModemManager. The EM7455 (Dell DW5811e) is not working when using the git master ModemManager/libmbim/libqmi. The last message piece from "ModemManager --debug": ModemManager[2470]: <info> [1435834110.545710] [mm-device.c:520] mm_device_create_modem(): Creating modem with plugin 'Dell' and '2' ports ModemManager[2470]: <debug> [1435834110.545727] [dell/mm-plugin-dell.c:382] create_modem(): Dell-branded generic modem found... ModemManager[2470]: <warn> [1435834110.545871] [mm-plugin.c:974] mm_plugin_create_modem(): Could not grab port (usbmisc/cdc-wdm0): 'Cannot add port 'usbmisc/cdc-wdm0', unsupported' ModemManager[2470]: <debug> [1435834110.545898] [mm-base-modem.c:312] mm_base_modem_grab_port(): (wwan0) type 'net' claimed by /sys/devices/pci0000:00/0000:00:14.0/usb2/2-2 ModemManager[2470]: <debug> [1435834110.545926] [mm-base-modem.c:1493] finalize(): Modem (Dell) '/sys/devices/pci0000:00/0000:00:14.0/usb2/2-2' completely disposed ModemManager[2470]: <warn> [1435834110.545939] [mm-base-manager.c:158] find_device_support_ready(): Couldn't create modem for device at '/sys/devices/pci0000:00/0000:00:14.0/usb2/2-2': Failed to find primary AT port I tried mbimcli by "mbimcli -d /dev/cdc-wdm0 --query-device-caps --verbose": [02 Jul 2015, 19:02:36] [Debug] opening device... [02 Jul 2015, 19:02:36] [Debug] [/dev/cdc-wdm0] Queried max control message size: 4096 [02 Jul 2015, 19:02:36] [Debug] [/dev/cdc-wdm0] Sent message... <<<<<< RAW: <<<<<< length = 16 <<<<<< data = 01:00:00:00:10:00:00:00:01:00:00:00:00:10:00:00 [02 Jul 2015, 19:02:36] [Debug] [/dev/cdc-wdm0] Sent message (translated)... <<<<<< Header: <<<<<< length = 16 <<<<<< type = open (0x00000001) <<<<<< transaction = 1 <<<<<< Contents: <<<<<< max_control_transfer = 4096 And the transaction repeats for 30 times, in the end it says: [02 Jul 2015, 19:03:06] [Debug] open operation timed out: closed error: couldn't open the MbimDevice: Transaction timed out But when using EM7305, everything works as expected.