I have a TL-WN725N v2 WiFi adapter and I can't get it working on Raspberry Pi running Arch Linux. Linux kernel version is 3.18.5-1-ARCH #1.
Some time ago, to make this adapter working, it was necessary to compile driver for every kernel version. Now I found that not so long ago the driver was included into kernel. I have tested it on Raspbian and it works. However I can't say the same about Arch Linux.
I'm not sure how to troubleshoot it, but here's what I tried to look at so far:
eth0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500 ether b8:27:eb:1b:a5:93 txqueuelen 1000 (Ethernet) RX packets 0 bytes 0 (0.0 B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 0 bytes 0 (0.0 B) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536 inet 127.0.0.1 netmask 255.0.0.0 inet6 ::1 prefixlen 128 scopeid 0x10<host> loop txqueuelen 0 (Local Loopback) RX packets 960 bytes 75840 (74.0 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 960 bytes 75840 (74.0 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 2: ifb0: <BROADCAST,NOARP> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 32 link/ether 82:7b:8e:6f:66:f0 brd ff:ff:ff:ff:ff:ff 3: ifb1: <BROADCAST,NOARP> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 32 link/ether 6e:7a:fd:64:91:45 brd ff:ff:ff:ff:ff:ff 4: eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state DOWN mode DEFAULT group default qlen 1000 link/ether b8:27:eb:1b:a5:93 brd ff:ff:ff:ff:ff:ff 5: wlan0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000 link/ether c0:4a:00:12:d1:2d brd ff:ff:ff:ff:ff:ff
wlan0 is listed here. If I try
ip link set wlan0 up it says
IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready .
Bus 001 Device 005: ID 0bda:8179 Realtek Semiconductor Corp. RTL8188EUS 802.11n Wireless Network Adapter
Module Size Used by joydev 9070 0 evdev 9900 0 hid_logitech_dj 10218 0 r8188eu 430207 0 leds_gpio 3492 0 led_class 4066 1 leds_gpio uio_pdrv_genirq 3238 0 uio 8753 1 uio_pdrv_genirq sch_fq_codel 7611 2 snd_bcm2835 19740 0 snd_pcm 86628 1 snd_bcm283 snd_timer 20697 1 snd_pcm snd 61799 3 snd_bcm2835,snd_timer,snd_pcm bcm2708_rng 1044 0 rng_core 5666 1 bcm2708_rng ipv6 327644 14
Here, I believe, it shows that r8188eu (the driver for the adapter) is there.
Still there's no connectivity and no blinking blue light.
I would highly appreciate any help or directions how to tackle this problem.