I have two older notebooks, both with just a single USB 1.1 port.
From time to time I have to connect more than one USB device, so I thought I'll buy one of these cardbus PCMCIA adapters which fit inside the PCMCIA port and provide 2 USB ports without anything sticking out from the notebook.
Well, today I bought "noname" adapter, I believe it is AKE BC168 card which should be supported by linux. Unfortunately it doesn't work.
The first machine, quite old Gericom branded laptop, Tualatin 1.4GHz with a SiS 630 based (chipset + graphics) motherboard.
It has two systems installed, 6.0 Debian 32 (which I barely use) and frequently updated Debian 7 which is my main O/S now.
It does not boot when the card is inserted, if I insert it while the O/S is already running, it either ignores that completely (lspcmcia shows only the cardbus interface, syslog is quiet) or freezes.
The other notebook is a bit newer, I don't remember the full specs but it's an old Toshiba running P4 2.0 on Intel-based board.
It's running Ubuntu 12.04.
It reacts differently - as soon as I put the card in the slot, the machine immediately freezes, nothing seems to be working, it doesn't react to keyboard (the caps lock/num lock light does not react), mouse, the screen is frozen (I can tell that by watching the clock).
However as soon as I remove the card, the machine comes back to life.
Just for test I found my old PCMCIA ethernet adapter, put it in both machines and it was immediately recognized and listed in lspcmcia output.
The main question is: could a "not supported" PCMCIA card cause system to crash/freeze, or was I just unlucky to buy a broken one ?
Here is a photo of my card: http://i.imgur.com/HK6O1.png
Perhaps someone knows if it requires external power all the time, or only if I plug in power hungry devices ? I thought it will come with manual but all I had in the package was the card and cable.