5g not showing up

[jmelton]

My hard drive recently died and, when the new HD was put in and Ubuntu 14.04 and Windows 8 were reinstalled, I was no longer able to see the 5g from my wireless in either OS. I know the router is not the issue, though, because I can still connect to 5g on both my Mac and my Android without any problem. What could be going on? Could it be a wireless card driver issue? My machine is a Dell Inspiron 3520, and the router is a Netgear WNDR3400v3. I've never had a problem before and I've had this computer and these OS's for a couple of years now.

[ajgreeny]

What exactly is this 5g that you can not see?

I don't understand your problem at the moment.

[kurt18947]

What exactly is this 5g that you can not see?

I don't understand your problem at the moment.

Just guessing here - 5ghz?

[rigged 00]

Hi
Just a guess, but if it is affecting both the Windows and Linux partitions then it might be that what ever caused your HDD to die could have damaged the WiFi Nic.
Or maybe if it is a onboard NIC it might be a BIOS setting that is missed.

[Vladlenin5000]

Or maybe you haven't installed the correct driver even in Windows. I would first confirm that by downloading and installing the recommended Dell driver (for Windows). Then reboot and test. Is it working now? If so, proceed to troubleshoot Linux.

[Vladlenin5000]

In a closer look, unless you upgraded the original WiFi you shouldn't have 5GHz anyway...

http://www.dell.com/us/dfh/p/inspiron-15-3520/pd -> Dell Wireless card 802.11 b/g/n (2.4G), BT4.0+HS

[jmelton]

How would it have worked before if it wasn't supposed to be technically possible? The card is definitely supposed to get the 5 ghz band and did until my new drive was installed.

I guess it's possible that the network card got damaged when the hard drive got trashed, as rigged 00 said above? Or the driver just happens to have something wrong with it in both Windows and Linux.

I can't even use Windows very well right now because when I upgraded to 8.1 yet another problem developed--the windows are flashing on and off and I'm barely able to type anything. Not sure what's up with that, I guess maybe another driver issue.

[Vladlenin5000]

I just told what I found. Have you read the product's page? There's no mention of other cards (many notebook models from all vendors, under the same model reference, usually have optional components such as a discreet graphics, different panels and different WiFi cards but not yours, according to Dell).
so... -Again-, unless you upgraded the original WiFi you shouldn't have 5GHz anyway... But there's no point in speculating.Please check which one you have simply by

sudo lshw -C network

and post the results.
Or, even better, follow the instructions to download and run the wireless script and post the results.

[jmelton]

Clearly I'm not speculating if I've had 5GHz before. What you googled was just a brief snippet about the card, not a full list of specs. I forget where, but I did actually find a fuller specification sheet that listed 5ghz capabilities. I also found a way to show the supported channels by running a command I found at http://unix.stackexchange.com/questi...supports-5ghz:

iwlist wlan0 freq

Output was:

wlan0 26 channels in total; available frequencies :
Channel 01 : 2.412 GHz
Channel 02 : 2.417 GHz
Channel 03 : 2.422 GHz
Channel 04 : 2.427 GHz
Channel 05 : 2.432 GHz
Channel 06 : 2.437 GHz
Channel 07 : 2.442 GHz
Channel 08 : 2.447 GHz
Channel 09 : 2.452 GHz
Channel 10 : 2.457 GHz
Channel 11 : 2.462 GHz
Channel 12 : 2.467 GHz
Channel 13 : 2.472 GHz
Channel 14 : 2.484 GHz
Channel 36 : 5.18 GHz
Channel 38 : 5.19 GHz
Channel 40 : 5.2 GHz
Channel 42 : 5.21 GHz
Channel 44 : 5.22 GHz
Channel 46 : 5.23 GHz
Channel 48 : 5.24 GHz
Channel 149 : 5.745 GHz
Channel 153 : 5.765 GHz
Channel 157 : 5.785 GHz
Channel 161 : 5.805 GHz
Channel 165 : 5.825 GHz
Current Frequency:2.442 GHz (Channel 7)

So, my wireless card should pick up whichever 5ghz frequency my router is sending out, which it did before and which my Mac still does. But for some reason it isn't showing up.

I just told what I found. Have you read the product's page? There's no mention of other cards (many notebook models from all vendors, under the same model reference, usually have optional components such as a discreet graphics, different panels and different WiFi cards but not yours, according to Dell).
so... -Again-, unless you upgraded the original WiFi you shouldn't have 5GHz anyway... But there's no point in speculating.Please check which one you have simply by

sudo lshw -C network

and post the results.
Or, even better, follow the instructions to download and run the wireless script and post the results.

[Vladlenin5000]

Nice, but where are the results of

sudo lshw -C network

???


(EDIT)

Oops... Deja vu -> http://ubuntuforums.org/showthread.php?t=2027925
I hope you honor us with your reply this time around.