Resolution on SCFB X11 Driver

[Charles W. Ross]

On Mon, Jun 27, 2016, at 08:02, alphachi wrote:
> https://forums.freebsd.org/threads/55222/

Thank you to all who responded! I now have my display set to the proper
resolution under the scfb driver! I can how happily use my Intel NUC in
a reasonable fashion until FreeBSD 11 comes along. The link above was
most helpful. Here are the steps I had to take to get the proper
resolution:

1) Boot into loader prompt.
2) Type "mode" to get a list of available modes.
3) Choose a mode and set it.
4) Back at the loader prompt, type 'gop get' to see what resolution that
mode permitted.
5) Eventually, I discovered that setting to mode '0' would result in a
1920*1200 option when the 'gop get' command was executed.
6) Boot the system and all is good!

Charlie
 
> 2016-06-25 3:16 GMT+08:00 Polytropon <freebsd at edvax.de>:
> 
> > On Fri, 24 Jun 2016 13:24:17 -0400, Charles W. Ross wrote:
> > > Hi all,
> > >
> > > I'm running FreeBSD 10.3 on an Intel NUC with 4th generation graphics.
> > > This is not supported by the i915 driver yet, so I'm using the SCFB
> > > (frame buffer) driver.
> > >
> > > It works, but I can't seem to set an optimal resolution. My display (24"
> > > Dell) supports 1920*1200, but the system only permits X11 to operate at
> > > 1280*1024.
> > >
> > > I have tried the usual settings in xorg.conf to define the display's
> > > "Modes" at 1920*1200, but no luck. Running 'xrandr' presents only one
> > > option: 1280*1024.
> > >
> > > I know the SCFB driver is capable of operating at higher resolutions,
> > > does anyone have any tips on how to set this?
> >
> > Some years ago, I had a similar problem with the nvidia driver
> > not providing a screen size biiger than 1024x768 (which isn't
> > that great on an 21" 4:3 CRT), so I tested and collected some
> > tweaks for xorg.conf. Maybe those are driver-specific or even
> > outdated, but maybe they can be an inspiration for further
> > investigations.
> >
> > I did manually define the monitor's physical parameters to
> > allow X to calculate the required resolution and size:
> >
> > Section "Monitor"
> >         Identifier      "Monitor0"
> >         VendorName      "Eizo"
> >         ModelName       "FlexScan F980"
> >         HorizSync       30.0 - 137.0
> >         VertRefresh     50.0 - 160.0
> >         Option          "DPMS"                  "false"
> >         DisplaySize     410 305
> >         # X*Y in mm for DPI calculation, cf. xinit -- -dpi 72/75/96/115
> > EndSection
> >
> > In that section, if I set
> >
> >         Option       "PreferredMode" "1920x1200"
> >
> > the system locked up. No idea why.
> >
> > Later on, I tried to set the DPI size and disable EDID information
> > retrieval:
> >
> > Section "Device"
> >         Identifier      "Card0"
> >         Driver          "nvidia"
> >         [...]
> >         Option          "UseEdid"               "FALSE"
> >         Option          "UseEdidDpi"            "FALSE"
> >         Option          "DPI"                   "96 x 96"
> > EndSection
> >
> > In the "most important section" of xorg.conf, I could successfully
> > set the screen sizes to switch manually (with Ctrl+Alt+[+]/[-] keys)
> > or via program (for example games that activated a full screen mode
> > that was not the "usual" mode).
> >
> > Section "Screen"
> >         Identifier      "Screen0"
> >         Device          "Card0"
> >         Monitor         "Monitor0"
> >         DefaultDepth    24
> >         SubSection "Display"
> >                 Viewport        0 0
> >                 Depth           24
> >                 Visual          "TrueColor"
> >                 Modes           "1400x1050" "1152x864" "1024x768"
> > "800x600" "640x480" "320x240"
> >         EndSubSection
> > EndSection
> >
> > In case of a flat panel, all size settings should be the same, and
> > in the "Screen" section, there should be only one entry of the
> > desired format.
> >
> > I always could manually switch to the desired mode:
> >
> >         xrandr --fb 1400x1050
> >         xrandr --size 1400x1050
> >
> > which I had temporarily put into ~/.xinitrc, but that looked wrong.
> >
> > With "xrandr" without parameter) you should then get a list of the
> > available modes, with the one selected at the top.
> >
> >
> >
> > --
> > Polytropon
> > Magdeburg, Germany
> > Happy FreeBSD user since 4.0
> > Andra moi ennepe, Mousa, ...
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> >
> 
> 
> 
> -- 
> Paranoid in Sabbath ...
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