The build-in card reader in Acer Aspire One Happy does not work in Ubuntu 11.10. Loading acpiphp kernel module will fix this problem.
a) Open the Ubuntu terminal Ctrl+Alt+T
b) Write this command (need password after enter):
sudo gedit /etc/modules
c) add acpiphp to the last line
d) Save then reboot Aspire One Happy.
a) Open the Ubuntu terminal Ctrl+Alt+T
b) Write this command (need password after enter):
sudo gedit /etc/modules
c) add acpiphp to the last line
d) Save then reboot Aspire One Happy.