These instructions are for installing the ivtv driver as a module. IMPORTANT: In case of problems first read this page: http://www.ivtvdriver.org/index.php/Troubleshooting Firmware ======== Instructions on how to obtain and install the required firmware files can be found here: http://www.ivtvdriver.org/index.php/Firmware Kernel 2.6 ========== CONFIG needed: 1. unpack the tarball 2. cd ivtv 3. make 4. make install (as root) 5. unload any old drivers 6. depmod 7. modprobe ivtv Comments: * The driver is not affected by the 4k/8k stacks kernel configuration. Creating device entries ======================= If you are using udev or devfs then devices should be created automatically. Otherwise you may need to: for i in 0 1 2 3 16 32 224 ; do \ if [ ! -f /dev/video$i ]; then \ echo "Creating /dev/video$i" && mknod /dev/video$i c 81 $i && \ chown video /dev/video$i && chmod 660 /dev/video$i; \ else echo "/dev/video$i already exists"; \ fi; \ done ln -s video0 /dev/video Here is a list of the base v4l devices: crw-rw---- 1 root video 81, 0 Jun 19 22:22 /dev/video0 crw-rw---- 1 root video 81, 16 Jun 19 22:22 /dev/video16 crw-rw---- 1 root video 81, 24 Jun 19 22:22 /dev/video24 crw-rw---- 1 root video 81, 32 Jun 19 22:22 /dev/video32 crw-rw---- 1 root video 81, 48 Jun 19 22:22 /dev/video48 crw-rw---- 1 root video 81, 64 Jun 19 22:22 /dev/radio0 crw-rw---- 1 root video 81, 224 Jun 19 22:22 /dev/vbi0 crw-rw---- 1 root video 81, 232 Jun 19 22:22 /dev/vbi8 crw-rw---- 1 root video 81, 248 Jun 19 22:22 /dev/vbi16 Note the permissions of the device entries; your system may differ, so ensure users have appropriate read/write access if receiving "permission denied" errors. Testing the installation ======================== install the modules modprobe ivtv Capture some video cat /dev/video0 > my.mpg (press ctrl-c after a few seconds) play it back (for cards with a decoder only) cat my.mpg >/dev/video16 or mplayer my.mpg or xine my.mpg With any luck you'll see a picture (or more likely static) and hear some sound. You can now use v4l2-ctl to set the input (s-video, audio etc) and ivtv-tune to select a channel. You may also now install the ivtvfb module: (for cards with a decoder only) modprobe ivtvfb This can result in a black screen as nothing is being shown. v4l2-ctl allows you to change the alpha (transparency) settings: v4l2-ctl -d /dev/video16 --set-fmt-output-overlay global_alpha=0 would turn off the fb display (clearest possible video) v4l2-ctl -d /dev/video16 --set-fmt-output-overlay global_alpha=50 would set the framebuffer to be transparency level 50 over the video. Debugging the framebuffer ========================= First make sure everything is wired up correctly. Check video out --------------- remove the video generating module and start it with a testcard image: rmmod ivtv saa7127 modprobe saa7127 test_image=1 modprobe ivtv You should see 8 coloured bars on the screen. Then restore normal operation: rmmod ivtv saa7127 modprobe saa7127 modprobe ivtv Troubleshooting =============== 1. If having memory allocation errors, try rebooting fresh, and putting this into /etc/sysctl.conf (or the corresponding /proc filessystem config under /proc/vm/min_free_kbytes doing 'echo 16384 > /proc/vm/min_free_kbytes`)... #for making ivtv happier with memory usage: vm.min_free_kbytes=16384 2. Always reboot cold when troubleshooting, the card will keep settings over normal reboots 3. The framebuffer will not allow direct writing safely, it will mess up encoding and decoding, usually making the chip inoperable until another reboot.