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When issuing xcalib commands I was getting the error Error - unsupported ramp size 0. I was able to fix this by creating the following file /etc/X11/xorg.conf.d/20-intel.conf and placing this text inside the file

Section "Device"
  Identifier "Intel Graphics"
  Driver "intel"
EndSection

This created a new issue, Nautilus omits random letters when displaying filenames, directories, menu entries, etc (see below). This is solved by adding a line Option "AccelMethod" "uxa" to my 20-intel.conf which unfortunately slows everything down, considerably.

Section "Device"
   Identifier  "Intel Graphics"
   Driver      "intel"
   Option      "AccelMethod"  "uxa"
EndSection

What's going on and what's the best way to fix it?

enter image description here

stackinator
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  • @DK Bose no this is a different Ubuntu Bionic Beaver machine, different from the `Desktop folders won't open with clean install of 18.04` issue. At first I was trying to simply use xcalib and would get the `unsupported ramp size` error. Fixing that then led to the `Missing letters in menus etc` error. If I could fix `xcalib unsupported ramp size` without having to create `20-intel.conf` file I'd be good. – stackinator Nov 07 '18 at 16:45
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    Given that there are performance issues that seem to be associated with fixing `xcalib` ramp issue, could you explain what you want to use `xcalib` for? Maybe there's a better alternative not requiring `xcalib`? Also why did you prefer `uxa` and not `sna`? – DK Bose Nov 08 '18 at 13:17
  • @DK Bose Didn't know `sna` existed so will definitly give that a go. If `sna` is the default acceleration method, it makes Nautilus drop letters in filenames/menu_entries as shown in pic above. I simply want to invert my desktop colors for easy night reading. `xcalib -i -a` seemed like the easiest solution but I'm open to alternatives. – stackinator Nov 08 '18 at 14:03
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    I played briefly with xcalib, but the problem with `-i` is that while white becomes black, black becomes white! I even played with `-co` but finally went with a dark gtk color scheme for all applications (and "dark" style sheets for browser pages) that I use day and night together with `sct 4500` for night. – DK Bose Nov 08 '18 at 14:18

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