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Old 03-28-2011, 01:42 AM
wu zhangjin
 
Default Bug#615609: Bug#615609: linux-image-2.6.37-1-loongson-2: Lemote mini-pc with linux-image-2.6.37-1-loongson-2 doesn't support external usb NIC (TU2-ET100)

Hi, Javier

Thanks very much for your report.

I don't have such a USB to reproduce the problem, hope the folks from
Lemote can work on it. thanks!

Regards,
Wu Zhangjin

On 3/28/11, Javier Vasquez <j.e.vasquez.v@gmail.com> wrote:
> Just to let you know the problem is still present under 2.6.37-2
> debian kernel and 2.6.38-1 debian kernel...
>
> --
> Javier.
>
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Old 05-14-2011, 09:43 PM
Javier Vasquez
 
Default Bug#615609: Bug#615609: linux-image-2.6.37-1-loongson-2: Lemote mini-pc with linux-image-2.6.37-1-loongson-2 doesn't support external usb NIC (TU2-ET100)

On Sun, Mar 27, 2011 at 7:42 PM, wu zhangjin <wuzhangjin@gmail.com> wrote:
> Hi, Javier
>
> Thanks very much for your report.
>
> I don't have such a USB to reproduce the problem, hope the folks from
> Lemote can work on it. thanks!
>
> Regards,
> Wu Zhangjin


Any sugestions on how to try debugging this?

--
Javier.



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Old 05-14-2011, 10:06 PM
Roman Mamedov
 
Default Bug#615609: Bug#615609: linux-image-2.6.37-1-loongson-2: Lemote mini-pc with linux-image-2.6.37-1-loongson-2 doesn't support external usb NIC (TU2-ET100)

On Sat, 14 May 2011 15:43:16 -0600
Javier Vasquez <j.e.vasquez.v@gmail.com> wrote:

> Any sugestions on how to try debugging this?

1) try this NIC with another machine (non-Loongson);

2) try another kind of NIC on this machine (e.g. there are MosChip mcs7830
based USB NICs which also support true USB 2.0 speeds, or if USB 1.1 with 12
mbit is enough, then Davicom dm9601 can be an option).

As for trying different module parameters you mentioned earlier, usbnet and
asix do not have any tunables, but ehci_hcd does have some, you can check
them out with "sudo modinfo ehci_hcd".

--
With respect,
Roman
 
Old 05-15-2011, 12:37 AM
Javier Vasquez
 
Default Bug#615609: Bug#615609: linux-image-2.6.37-1-loongson-2: Lemote mini-pc with linux-image-2.6.37-1-loongson-2 doesn't support external usb NIC (TU2-ET100)

> 1) try this NIC with another machine (non-Loongson);

Done, it works well on x86_32 and x86_64 (both intel).

I've also tried:

acpi=noirq
usbcore.autosuspend=-1

Which in the past have been able to solve other serial usb issues, but
none worked out...

> 2) try another kind of NIC on this machine (e.g. there are MosChip mcs7830
> based USB NICs which also support true USB 2.0 speeds, or if USB 1.1 with 12
> mbit is enough, then Davicom dm9601 can be an option).

I'll look for them. I acquired another one to try, but at the end it
was based upon the same chipset, so also the same driver, so it didn't
help. I'll look in the web...

>
> As for trying different module parameters you mentioned earlier, usbnet and
> asix do not have any tunables, but ehci_hcd does have some, you can check
> them out with "sudo modinfo ehci_hcd".

Thanks a lot Roman, I'll investigate as soon as possible. I'd like a
work around before going to buy something else, so this will be my
first step, :-)

So far no luck, but I'll keep trying, and if anyone gets to find
something, please let me know...

Javier.



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