Discussione unita da Zzed
Ciao, uso raspbian 8 su una raspberry pi 3 model b aggiornato e l'ho collegata a un vecchio monitor vga tramite un cavo hdmi-vga, risultato:
Il monitor dice di non ricevere il segnale VGA, però la raspberry a questo comando
risponde questo:
Codice:
Group DMT has 7 modes:
mode 4: 640x480 @ 60Hz 4:3, clock:25MHz progressive
mode 8: 800x600 @ 56Hz 4:3, clock:36MHz progressive
mode 9: 800x600 @ 60Hz 4:3, clock:40MHz progressive
mode 16: 1024x768 @ 60Hz 4:3, clock:65MHz progressive
(prefer) mode 23: 1280x768 @ 60Hz 15:9, clock:79MHz progressive
mode 39: 1360x768 @ 60Hz 16:9, clock:85MHz progressive
mode 85: 1280x720 @ 60Hz 16:9, clock:74MHz progressive
è un buon indizio? Ho possibilità di riuscita nell'intento di usare la raspberry con questo vecchio monitor?
ho provato modificando il /boot/config.txt
tolto i commenti a queste due righe:
hdmi_group=2
hdmi_mode=85
poi ho provato anche con hdmi_mode=23 4 e 8 ma nulla e anche ho provato a togliere il commento a hdmi_safe=1 ma ancora nulla, schermo nero ..
qui il file di configurazione al completo:
Codice:
[color=#000000]# For more options and information see
# http://rpf.io/configtxtreadme
# Some settings may impact device functionality. See link above for details
# uncomment if you get no picture on HDMI for a default "safe" mode
#hdmi_safe=1
# uncomment this if your display has a black border of unused pixels visible
# and your display can output without overscan
#disable_overscan=1
# uncomment the following to adjust overscan. Use positive numbers if console
# goes off screen, and negative if there is too much border
#overscan_left=16
#overscan_right=16
#overscan_top=16
#overscan_bottom=16[/color]
[color=#000000][color=#000000]# uncomment to force a console size. By default it will be display's size minus
# overscan.
#framebuffer_width=1280
#framebuffer_height=720
# uncomment if hdmi display is not detected and composite is being output
#hdmi_force_hotplug=1
# uncomment to force a specific HDMI mode (this will force VGA)
hdmi_group=2
hdmi_mode=8
# uncomment to force a HDMI mode rather than DVI. This can make audio work in
# DMT (computer monitor) modes
#hdmi_drive=2
# uncomment to increase signal to HDMI, if you have interference, blanking, or
# no display
#config_hdmi_boost=4[/color][/color]
[color=#000000][color=#000000][color=#000000]# uncomment for composite PAL
#sdtv_mode=2
#uncomment to overclock the arm. 700 MHz is the default.
#arm_freq=800
# Uncomment some or all of these to enable the optional hardware interfaces
#dtparam=i2c_arm=on
#dtparam=i2s=on
#dtparam=spi=on
# Uncomment this to enable the lirc-rpi module
#dtoverlay=lirc-rpi
# Additional overlays and parameters are documented /boot/overlays/README
# Enable audio (loads snd_bcm2835)
dtparam=audio=on
display_rotate=0
gpu_mem=128[/color][/color][/color]