Hi Ralf--
Kevin passed your email on to my attention and I think we can help you with this problem. We've been doing a lot of work on our drivers lately and I've got a freshly-ready version of sierra.c just for 2.6.28. We've done a lot of testing here and it seems pretty robust; perhaps you'd be willing to give it a try?
Since I'm not sure about the etiquette for posting to this list, so I will attach the driver in a separate email to you.
Regards
Rory Filer
-----Original Message-----
From: Ralf Nyren [mailto:ralf@xxxxxxxxx]
Sent: Friday, March 13, 2009 8:01 AM
To: linux-kernel@xxxxxxxxxxxxxxx
Cc: Kevin Lloyd
Subject: Sierra Wireless (MC8780) HSDPA speed issue
Hi,
I have a Sierra Wireless MC8780 UMTS card in a Fujitsu S6410 laptop running kernel 2.6.28.7. In kernel sierra driver v1.3.2.
The card works but speed seems limited to approx 1.0 Mbit/s download using the linux driver. Testing the card in Windows XP yields download speeds close to 5.0 Mbit/s.
I recently updated the firmware of the card to support HSDPA/HSUPA. The update gave the desired result in Windows but not in Linux. The speed improved in Linux but didn't increase above 1 Mbit/s.
Is there any known driver limitations or is this a configuration issue?
Please let me know if you need any additional information.
Best regards, Ralf