kernel oops with SpeedTouch USB ADSL modem

[Xavier Bassery]

version: 2.6.27.7.9

When plugging an Alcatel SpeedTouch usb adsl modem to the laptop, dmesg shows a kernel oops (see attachment).
On a 8.04 machine, the relevant lsusb output is :
    Bus 003 Device 002: ID 06b9:4061 Alcatel Telecom SpeedTouch ISDN or ADSL Modem

[Klepson (ayrie3)]

I've got the same problem. Sometimes it happens though that the modem is detected correctly and it's even possible to establish a working connection. Though, that has never happened when the modem was pluged in during system boot.

[cdarken (cata-en)]

I have also a speedtouch 330 modem and when I boot with the latest kernel, I get the same error.
This is a confirmed problem of 2.6.27 kernel. I have tried this on gentoo also, and I was able to find a solution searching on the internet.
You can read the solution here: http://bugzilla.kernel.org/show_bug.cgi?id=11767

I used the patch given there and I can confirm that it works on kernel 2.6.27-3.

Again the patch, credit to Alan Stern, quoting from his post:

>> The problem is that the speetch driver calls usb_reset_device() without
>> defining pre_reset and post_reset methods. As a result, any interfaces
>> it claims during probe get disconnected.

>> Here's a minimal fix. It isn't entirely correct, but at least it
>> should get the driver working as well as it did before 2.6.27.

>> Alan Stern

Index: usb-2.6/drivers/usb/atm/speedtch.c
===================================================================
--- usb-2.6.orig/drivers/usb/atm/speedtch.c
+++ usb-2.6/drivers/usb/atm/speedtch.c
@@ -722,6 +722,16 @@ static void speedtch_atm_stop(struct usb
        flush_scheduled_work();
 }

+static int speedtch_pre_reset(struct usb_interface *intf)
+{
+ return 0;
+}
+
+static int speedtch_post_reset(struct usb_interface *intf)
+{
+ return 0;
+}
+

 /**********
 ** USB **
@@ -740,6 +750,8 @@ static struct usb_driver speedtch_usb_dr
        .name = speedtch_driver_name,
        .probe = speedtch_usb_probe,
        .disconnect = usbatm_usb_disconnect,
+ .pre_reset = speedtch_pre_reset,
+ .post_reset = speedtch_post_reset,
        .id_table = speedtch_usb_ids
 };

I hope we'll see this patch in the kernel that comes on the cd, because I think a lot of people use this modem, and it would be a shame not to let them enjoy the new release.

[cdarken (cata-en)]

So? I didn't see any changes. Can we expect changes on a new version of the iso image? Or at least in a kernel update.

[Xavier Bassery (xaba)]

FYI I have seen lately a new kernel version (2.6.27-8.17) in intrepid-proposed (https://wiki.ubuntu.com/Testing/EnableProposed) that should include the fix you have mentioned to this bug.
The changelog reads in the "upstream kernel changes" section:
    * USB: Speedtouch: add pre_reset and post_reset routines
This kernel encompasses the upstream version 2.6.27.4.

I haven't had the chance to test it for not having such a device at hand any more.

[tobal (lopeztobal)]

I've installed this new kernel version (2.6.27-8.17) and my speedtouch330 works fine, thank you

[Philip Aston (philipa)]

I see this oops with 2.6.27.9 (which you would think would include the fix if 2.6.27-8.17 did).

Anyway, AFAICS 2.6.27.8.17 is no longer in intrepid-proposed, so I took 2.6.27.11, which works too.