If your parallel port display does not work, please run lcd4linux -Fvv and have a look at the output. if you get these messages:
HD44780: using ppdev /dev/lp0 HD44780: ioctl(/dev/lp0, PPCLAIM) failed: 22 Invalid argument HD44780: could not initialize parallel port! HD44780: start display failed!
then you did not read the documentation, because there it reads:
Note that you have to use parport devices (usually /dev/parports/* or /dev/parport* with major number 99), the printer devices (/dev/printers/* or /dev/lp* with major number 6) do NOT work!
So you have to change your lcd44linux.conf and replace the Port '/dev/lp0' with Port '/dev/parports/0'
If you don't have that you'll need to create it first with 'mknod /dev/parport0 c 99 0'.
not approved yet Of course, you have to had permission to use /dev/parport0 For some reason, changing the permission with chmod do not hold after a restart on some distribution. Instead, you should just make sure the user that runs the program is in the lp group. not approved yet
If you get the message “usb_claim_interface() failed”, you probably do not have sufficient user rights to access your display. Here's how to solve it on Debian based systems that use “udev”:
1. create the group “lcdusers” by running
# sudo groupadd --system lcdusers
2. add yourself to this group
# sudo usermod --append --groups lcdusers your_username
3. find the “idVendor” values for your display (in this case “04d8” and “c002” for the “picoLCD 256×64”):
# lsusb Bus 003 Device 002: ID 04d8:c002 Microchip Technology, Inc.
4. create the file “/etc/udev/rules.d/60-lcd.rules” with the following contents (you'll of course have to change the “idVendor” and “idProduct”):
SUBSYSTEM!="usb_device", ACTION!="add", GOTO="lcd_rules_end"
# picoLCD
SYSFS{idVendor}=="04d8", SYSFS{idProduct}=="c002", GROUP="lcdusers", MODE="0660"
LABEL="lcd_rules_end"
5. it might be necessary to reboot your system. Then run “ls -l /dev/usb/” to verify that your display is in the “lcd_users” group:
# ls -l /dev/usb/ total 0 crw-rw---- 1 root lcdusers 180, 96 2010-01-20 13:55 hiddev0
6. enjoy your new display… :)
Not all plugins works well with cygwin:
./configure --with-drivers=VNC,NULL --with-plugins='all,!dvb,!i2c_sensors,pop3'
Now it works like a charm…