X trouble on Rpi3, was Re: Missing /dev/io on rpi3 running 12-stable

[bob prohaska]

On Fri, May 22, 2020 at 10:51:32PM -0700, Mark Millard wrote:
> 
> They implicitly suggest that fbbpp needs to be set to 32 (for the sparse 32 bit
> framebuffer layout). You may want to try -fbbpp 32 on the command that starts
> the server to find out if it proves dsufficient.
> 

Apparently something more clever than 
X -fbbpp 32 
or
startx -fbbpp 32 
is required. Neither seems to make a difference. 

Can the -fbbpp parameter be set in xorg.conf? Right now
it contains:
Section "Files"
EndSection 
Section "Module"
    Load        "dbe"
    Disable    "dri"
    Disable    "dri2"
    Disable    "glx"
    SubSection  "extmod"
       Option  "omit xfree86-dga"
    EndSubSection
EndSection


Section "ServerFlags"
    Option    "AIGLX"        "false"
    Option    "NoAccel"    "True"
    Option    "NoDRI"        "True"
    Option    "DRI"        "False"
    Option    "DRI2"        "False"
EndSection


Section "InputDevice"
    Identifier  "Keyboard1"
    Driver      "kbd"
EndSection


Section "InputDevice"
    Identifier  "Mouse1"
    Driver      "mouse"
    Option      "Protocol"      "auto"
    Option      "Device"        "/dev/sysmouse"
EndSection


Section "Monitor"
    Identifier  "Monitor"
EndSection


Section "Device"
    Identifier  "Generic FB"
    Driver      "scfb"
    Option    "NoAccel"    "True"
EndSection


Section "Screen"
    Identifier  "Screen"
    Device      "Generic FB"
    Monitor     "Monitor"
    DefaultDepth 16
    SubSection "Display"
       Depth           16
    EndSubsection
EndSection


Section "ServerLayout"
    Identifier  "layout"
    Screen      0 "Screen" 0 0
    InputDevice "Mouse1" "CorePointer"
    InputDevice "Keyboard1" "CoreKeyboard"
EndSection

Thanks for reading!

bob prohaska