All of them give the right side of 5 volts at the header pins on the A's . This being Europe, all the power supplies have fixed leads.
3 different wifi adaptors which all happen to be RTL8188CUS chipsets, all work perfectly in B's. In the A's they are problematic, and each of the 3 adaptors varies in how problematic. 2 of them work all the time in my 'A' the third is intermittent, sometimes it works and sometimes it doesn't. SSHing to it will not work one minute, and gives the old 'no route to host' message and 2 minutes later it will connect and I haven't touched anything. When its connected it doesn't respond cleanly I type something and there is often several seconds between typing and it appearing on the screen. a minute later it works normally.
On the new A+ all three of them are intermittent with the worst on the A refusing almost all of the time, with the other 2 working sometimes. Identical symptoms to the A. The A with one of the 'good' adaptors will work long term. several weeks I've had it up.
Jumped all the hoops, latest Raspbian, numerous incarnations of /etc/network/interfaces and other configuration options, none of which makes any difference.
I've had RT5370 adaptors in the past but it looks like I sold them to customers (they seem to work better with a certain Redmond OS), I've ordered another to see if it works with the As.
This is my usual stuff that works fine on all B's and the A+ sometimes :
Code: Select all
sv@STSR-Desktop:~$ ssh firstname.lastname@example.org Linux raspa 3.12.28+ #709 PREEMPT Mon Sep 8 15:28:00 BST 2014 armv6l The programs included with the Debian GNU/Linux system are free software; the exact distribution terms for each program are described in the individual files in /usr/share/doc/*/copyright. Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent permitted by applicable law. Last login: Thu Nov 13 12:35:51 2014 from 192.168.1.102 root@raspa:~# cat /etc/network/interfaces auto lo iface lo inet loopback auto wlan0 iface wlan0 inet static address 192.168.1.253 broadcast 192.168.1.255 gateway 192.168.1.1 wpa-ssid "TP-LINK_xxxxx" wpa-psk "whatever" wireless power off root@raspa:~# lsusb Bus 001 Device 002: ID 0bda:8176 Realtek Semiconductor Corp. RTL8188CUS 802.11n WLAN Adapter Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub root@raspa:~#
Maybe the developers can shed some light. All suggestions gratefully received.
I've been around long enough with enough posts to show I'm no noob. Been around Linux since the 90's, I like to think I have a clue and I earn a living mending computers.