VGA issue

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This topic contains 3 replies, has 4 voices, and was last updated by Profile photo of lg416 lg416 1 year, 4 months ago.

Viewing 4 posts - 1 through 4 (of 4 total)
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  • #109165
    Profile photo of bistule
    bistule
    Participant

    Hi,

    I bought a VGA converter cause my Acer X193HQ has only a VGA entry.

    So, to configure my retropie, i wrote this in /boot/config.txt :

    # uncomment if you get no picture on HDMI for a default "safe" mode
    
    hdmi_safe=1
    
    #disable_commandline_tags=1
    
    #uncomment this if your display has a black border of unused pixels visible
    #and your display can output without overscan
    #disable_overscan=1
    
    #hdmi_ignore_edid_=0xa5000080
    
    #uncomment the following to adjust overscan. Use positive numbers if console
    #goes off screen, and negative if there is too much border
    #overscan_left=30
    #overscan_right=15
    #overscan_top=20
    #overscan_bottom=10
    
    #uncomment to force a console size. By default it will be display's size minus
    #overscan.
    #framebuffer_width=1366
    #framebuffer_height=768
    
    #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=81
    
    #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
    
    #uncomment for composite PAL
    #sdtv_mode=2
    #sdtv_aspect=1
    
    #for more options see http://elinux.org/RPi_config.txt
    gpu_mem_256=128
    gpu_mem_512=256
    gpu_mem_1024=256
    
    overscan_scale=1
    arm_freq=950
    core_freq=250
    sdram_freq=450
    over_voltage=6

    but, when i reboot, i still have this value:

    pi@retropie ~ $ tvservice -s
    state 0x12000a [HDMI DMT (4) RGB full 4:3], 640x480 @ 60.00Hz, progressive

    and my display is totally awful, flat, and pixelised ! :-1:

    even i choose hdmi group 2 ande mode 81 !

    with tvservice -m DMT, i found this values for my screen :

    Group DMT has 11 modes:
      (prefer) mode 4: 640x480 @ 60Hz 4:3, clock:25MHz progressive
               mode 5: 640x480 @ 72Hz 4:3, clock:31MHz progressive
               mode 6: 640x480 @ 75Hz 4:3, clock:31MHz progressive
               mode 8: 800x600 @ 56Hz 4:3, clock:36MHz progressive
               mode 9: 800x600 @ 60Hz 4:3, clock:40MHz progressive
               mode 10: 800x600 @ 72Hz 4:3, clock:50MHz progressive
               mode 11: 800x600 @ 75Hz 4:3, clock:49MHz progressive
               mode 16: 1024x768 @ 60Hz 4:3, clock:65MHz progressive
               mode 17: 1024x768 @ 70Hz 4:3, clock:75MHz progressive
               mode 18: 1024x768 @ 75Hz 4:3, clock:78MHz progressive
               mode 81: 1366x768 @ 60Hz 16:9, clock:85MHz progressive

    With the tvservice command, i can change the resolution, but, after reboot, this settings disapear !

    Someone has the same issue ?

    #109221
    Profile photo of buzz
    buzz
    Keymaster

    Did you read http://elinux.org/RPiconfig#Video_mode_options ?

    to boot in DMT mode 16 you would add these to /boot/config.txt

    
    hdmi_group=2
    hdmi_mode=16
    
    #109350
    Profile photo of jonahuk
    jonahuk
    Participant

    Put a # before hdmi_safe=1 and then reboot.
    If you can’t get the desired resolution and/or it blackscreens, you may need a powered HDMI to VGA adaptor.

    #111030
    Profile photo of lg416
    lg416
    Participant

    I bought a cheap HDMI to VGA adapter (Camac brand) on ebay and it worked perfectly with no setup at all

    if you cant get yours working, I can vouch for this brand adapter on ebay

Viewing 4 posts - 1 through 4 (of 4 total)

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