kbpro wrote: > When I power it up the backlight comes on and the screen fades to grey > (with some light vertical lines). > I don't get the rainbow display and subsequent boot text. The Pi boots > successfully and is accessible via the network but the display never > updates. > [...] > The manufacturing date of the first (problem) touchscreen appears to be > 2012, and the second (working) one appears to be 2009. Attached is a > picture of the numbers printed on the back of the screen. > Just another idea to check (): There are two generations of these displays: With the newer one you can control the brightness of the backlight while the first generation has only an on/off capability. In both types, the backlight is controlled by the content of the file '/sys/class/backlight/rpi_backlight/brightness'. For the first generation, a value greater than '0' will switch on the the backlight while '0' means 'backlight off'. The second generations accepts values between 0 and 255. The higher the value the higher the brightness. Now comes the important part for you, kbpro: values lower than 10 (or 11) lead to a black (or dark) display what is similar to the behaviour of your display.
Hence, I suggest to check the value in the file '/sys/class/backlight/rpi_backlight/brightness' whether it is in the range of 1 ... 10. If yes, then choose an higher one (50 is more than sufficient. ------------------------------------------------------------------------ jd68's Profile: http://forums.slimdevices.com/member.php?userid=30795 View this thread: http://forums.slimdevices.com/showthread.php?t=113512 _______________________________________________ unix mailing list unix@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/unix
