I'm using a HUAWEI MODEM as internet device connection at my workplace (a printing house) on a SAMSUNG DP-U250 all-in-one PC. Because many of my customers come from windows OS, I had to setup dual boot Win 10 + Ubuntu 17.04 so I can work on ubuntu during night, since I am a developper.
The issue now comes for wifi connection that is slow, very slow, too slow when working on ubuntu. It wasn't working for Ubuntu 16.10... And from time to time, the wifi get disconnected. My MODEM is just under my PC, so I don't have any reason to think it might be the distance.
After I google'd the issue, I came about this accepted solution. My session crashed right after I pressed ENTER to run the command line and I had to do a manual reboot...
Only to discover that my wifi interface can see the wifi network but cannot connect. It just fails any time, prompting for password change, which I have not yet changed. To be sure, relatives with whom I share the network can still connect to internet through the same WIFI. I even deleted the connection from the connection manager but nothing. It doesn't work.
What I Need
I executed the command without have first read the manual, so I'll want some links to better understand what I have done.
I need a way to fix this without reinstalling ubuntu. I use to quickly reinstalling OS when I've twisted its config files too much but I want to grow a little and learn to fix my mess.
I was reluctant to ask a new question because I've been downvoted for almost each of the few questions I asked on stackoverflow, but chili555 took the step, encouraged me and asked for more informations. Here follows the outputs:
lspci -nnk | grep 0280 -A3
02:00.0 Network controller : Realtek Semiconductor Co., Ltd. RTL8192E/RTL8192SE Wireless LAN Controller [10ec:8192] (rev 01) Subsystem: Askey Computer Corp. RTL8192E/RTL8192SE Wireless LAN Controller [144f:7160] Kernel driver in use: rtl819xE Kernel modules: rtl8192se, r8192e_pci
lsmod | grep 8192
snd_hda_core 81920 4 snd_hda_intel,snd_hda_codec,snd_hda_codec_generic,snd_hda_codec_realtek r8192e_pci 135168 0 rtllib 151552 1 r8192e_pci rtl8192se 65536 0 rtl_pci 28672 1 rtl8192se rtlwifi 73728 2 rtl8192se,rtl_pci mac80211 782336 3 rtl8192se,rtl_pci,rtlwifi
dmesg | grep -e 8192 -e wlp
[ 0.000000] setup_percpu: NR_CPUS:8192 nr_cpumask_bits:2 nr_cpu_ids:2 nr_node_ids:1 [ 0.000000] percpu: Embedded 36 pages/cpu @ffffa0893fc00000 s107992 r8192 d31272 u1048576 [ 0.000000] pcpu-alloc: s107992 r8192 d31272 u1048576 alloc=1*2097152 [ 0.000000] RCU restricting CPUs from NR_CPUS=8192 to nr_cpu_ids=2. [ 0.012669] Mount-cache hash table entries: 8192 (order: 4, 65536 bytes) [ 0.012680] Mountpoint-cache hash table entries: 8192 (order: 4, 65536 bytes) [ 0.148124] pci 0000:02:00.0: [10ec:8192] type 00 class 0x028000
Thanks in advance.