On 01/16/2015 07:09 AM, poma wrote:
On 16.01.2015 10:37, Hayes Wang wrote:
  poma [mailto:pomidorabelis...@gmail.com]
Sent: Friday, January 16, 2015 4:25 PM
[...]
This looks like a USB problem. Is there a way to get usb (or
NetworkManager) to reinitialize the driver when this happens?

I would ask these people for advice, therefore.

Our hw engineers need to analyse the behavior of the device.
However, I don't think you have such instrument to provide
the required information. If we don't know the reason, we
couldn't give you the proper solution. Besides, your solution
would work if and only if reloading the driver is helpful.

The issue have to debug from the hardware, and I have no idea
about what the software could do before analysing the hw. Maybe
you could try the following driver first to check if it is useful.

http://www.realtek.com.tw/downloads/downloadsView.aspx?Langid=2&PNid=13&PFid=56&Level=5&Conn=4&DownTypeID=3&GetDown=false

Best Regards,
Hayes


Thanks for your response, Mr. Hayes.

Mr. Sean, please download and check if "timeout" is still present with built 
RTL8153 module from REALTEK site, as Mr. Hayes proposed.
http://www.realtek.com.tw/downloads/downloadsView.aspx?Langid=2&PNid=13&PFid=56&Level=5&Conn=4&DownTypeID=3&GetDown=false#2
r8152.53-2.03.0.tar.bz2

Procedure - should be equal for both, Fedora 21 & 20:

$ uname -r
3.17.8-300.fc21.x86_64

$ su -c 'yum install kernel-devel'

$ tar xf r8152.53-2.03.0.tar.bz2
$ cd r8152-2.03.0/
$ make
$ su

# cp 50-usb-realtek-net.rules /etc/udev/rules.d/
# udevadm trigger --action=add

# modprobe -rv r8152
# cp r8152.ko /lib/modules/$(uname -r)/updates/
# depmod
# modprobe -v r8152


poma

OK. Did all that. Now to see if I get the same problem over the next couple of weeks.

I'd never heard about the updates subfolder in modules. Very slick.

But when I update the kernel, I get to do this again correct? How will I know that this module has been incorporated in the running kernel. modinfo doesn't give any version info.

BTW, I'm not sure what modprobe --dump-modversions is supposed to do, but it doesn't:

#modprobe --dump-modversions r8152
modprobe: FATAL: Module r8152 not found.
# modprobe --dump-modversions r8152.ko
modprobe: FATAL: Module r8152.ko not found.
#lsmod | grep 8152
r8152                  49646  0

Thanks for all your help.

sean

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