Edimax EW-7811UN Wireless USB Adapter seems to go to sleep sometimes.

linustalman · 04-14-2017, 07:39 AM

I don't think my kernel has changed in a while.

Code:

sudo dkms install rtl8192cu/0.1

Code:

Error! Your kernel headers for kernel 4.9.0-0.bpo.2-amd64 cannot be found.
Please install the linux-headers-4.9.0-0.bpo.2-amd64 package,
or use the --kernelsourcedir option to tell DKMS where it's located

Edit: I tried to install linux-headers-4.9.0-0.bpo.2-amd64 but got a failed to fetch error in Synaptic.

petelq · 04-14-2017, 04:18 PM

Quote:

Originally Posted by linustalman

I don't think my kernel has changed in a while.

Code:

sudo dkms install rtl8192cu/0.1

Code:

Error! Your kernel headers for kernel 4.9.0-0.bpo.2-amd64 cannot be found.
Please install the linux-headers-4.9.0-0.bpo.2-amd64 package,
or use the --kernelsourcedir option to tell DKMS where it's located

Edit: I tried to install linux-headers-4.9.0-0.bpo.2-amd64 but got a failed to fetch error in Synaptic.

You need the headers to compile the rtl8192cu module. Have you tried 'apt install'. I think synaptics is less reliable these days. Certainly the latest version won't upgrade.

Or you could download the 2 header files and install with dpkg -i

linustalman · 04-15-2017, 02:07 PM

Quote:

Originally Posted by petelq

You need the headers to compile the rtl8192cu module. Have you tried 'apt install'. I think synaptics is less reliable these days. Certainly the latest version won't upgrade.

Or you could download the 2 header files and install with dpkg -i

You got it - this did the trick.

Code:

sudo apt install linux-headers-4.9.0-0.bpo.2-amd64

I noticed one of the lines in the output was:

Code:

Error! Bad return status for module build on kernel: 4.9.0-0.bpo.2-amd64 (x86_64)

petelq · 04-16-2017, 04:45 AM

I'm not great with Debian/Ubuntu varieties but I thought there was normally 2 sets of header files. Can you install linux-headers-4.9.0-0.bpo.2-all-amd64 as well. Then try again.

linustalman · 04-16-2017, 04:52 AM

Quote:

Originally Posted by petelq

I'm not great with Debian/Ubuntu varieties but I thought there was normally 2 sets of header files. Can you install linux-headers-4.9.0-0.bpo.2-all-amd64 as well. Then try again.

Yes, that was possible.

Code:

sudo apt install linux-headers-4.9.0-0.bpo.2-all-amd64

Some output lines :

Code:

...
The following extra packages will be installed: linux-headers-4.9.0-0.bpo.2-common-rt linux-headers-4.9.0-0.bpo.2-rt-amd64
...
Error! Bad return status for module build on kernel: 4.9.0-0.bpo.2-rt-amd64 (x86_64)
...

petelq · 04-16-2017, 01:16 PM

Quote:

Originally Posted by linustalman

Yes, that was possible.

Code:

sudo apt install linux-headers-4.9.0-0.bpo.2-all-amd64

Some output lines :

Code:

...
The following extra packages will be installed: linux-headers-4.9.0-0.bpo.2-common-rt linux-headers-4.9.0-0.bpo.2-rt-amd64
...
Error! Bad return status for module build on kernel: 4.9.0-0.bpo.2-rt-amd64 (x86_64)
...

This was on the headers install? Sometimes an error is reported but doesn't stop the install. Have you tried to rerun the dkms install procedure?

linustalman · 04-16-2017, 01:18 PM

Quote:

Originally Posted by petelq

This was on the headers install? Sometimes an error is reported but doesn't stop the install. Have you tried to rerun the dkms install procedure?

Yes, those were a selection of lines from the install -- it did install alright.

My wireless has been perfect since so I will wait and see how it goes over time.

linustalman · 04-19-2017, 04:53 AM

Hi Pete.

My wireless is still perfect days later. The last step seems to have sorted it all out.

petelq · 04-19-2017, 08:38 AM

Quote:

Originally Posted by linustalman

Hi Pete.

My wireless is still perfect days later. The last step seems to have sorted it all out.

Glad to hear it. Always remember dkms status(the one I almost forgot) for future checks.

linustalman · 06-01-2017, 07:40 AM

I've moved back to using the Netgear Wireless WNA3100M N300 USB Adaptor as the Edimax was alright for regular internet use but was awful when downloading large files - too much stopping and broken downloads.