radeontool -V (return code: 255)
error: cannot find Radeon device
usage: radeontool [options] [command]
--debug - show a little debug info
--skip=1 - use the second radeon card
dac [on|off] - power down the external video outputs
light [on|off] - power down the backlight
stretch [on|off|vert|horiz|auto|manual] - stretching for resolution mismatch
regs - show a listing of some random registers
regmatch <pattern> - show registers matching wildcard pattern
regset <pattern> <value> - set registers matching wildcard pattern
radeontool --help (return code: 255)
error: cannot find Radeon device
usage: radeontool [options] [command]
--debug - show a little debug info
--skip=1 - use the second radeon card
dac [on|off] - power down the external video outputs
light [on|off] - power down the backlight
stretch [on|off|vert|horiz|auto|manual] - stretching for resolution mismatch
regs - show a listing of some random registers
regmatch <pattern> - show registers matching wildcard pattern
regset <pattern> <value> - set registers matching wildcard pattern