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Linux 5.20 To Feature Faster Console Scrolling At Boot For Old FBDEV Drivers

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  • Linux 5.20 To Feature Faster Console Scrolling At Boot For Old FBDEV Drivers

    Phoronix: Linux 5.20 To Feature Faster Console Scrolling At Boot For Old FBDEV Drivers

    This week's DRM-Misc-Next pull request was sent out of new DRM changes ready for queuing ahead of Linux 5.20. There isn't too much to get excited about for this week's code updates going to DRM-Next, but there is "fbcon: Improve scrolling performance" that did get my attention...

    https://www.phoronix.com/scan.php?pa...Scrolling-Perf

  • #2
    And here I was hoping it had something to do with scrollback which was removed earlier in the 5.x cycle.
    For anyone interested, I just found a patch to restore it: https://marc.info/?l=gentoo-user&m=163250452914253&w=2
    Apparently it's even better than before and provides separate scrollback beffer for each vt.

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    • #3
      Originally posted by binarybanana View Post
      And here I was hoping it had something to do with scrollback which was removed earlier in the 5.x cycle.
      For anyone interested, I just found a patch to restore it: https://marc.info/?l=gentoo-user&m=163250452914253&w=2
      Apparently it's even better than before and provides separate scrollback beffer for each vt.
      Sadly Gentoo doesn't include it and I haven't been able to find a newer version of the patch which is applicable to kernel 5.18

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      • #4
        Here's the last version of the patch for Linux 5.10 and 5.14: https://marc.info/?l=gentoo-user&m=163363597517098&w=2

        There've been no further updates: https://marc.info/?a=103367073500003&r=1&w=2

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        • #5
          I wonder if this is similar to the work that John Carmack did on OpenBSD's framebuffer console?:

          https://freshbsd.org/openbsd/src/com...VU0SiC2NWlZh8H

          This stuff is certainly useful. The sharp DRM consoles look great but really do take it out of the machine trying to render them when things scroll past quickly!
          Last edited by kpedersen; 23 June 2022, 01:43 PM.

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          • #6
            What about true color support for the tty?

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            • #7
              Originally posted by birdie View Post
              Here's the last version of the patch for Linux 5.10 and 5.14: https://marc.info/?l=gentoo-user&m=163363597517098&w=2

              There've been no further updates: https://marc.info/?a=103367073500003&r=1&w=2
              Manjaro provides their scrollback patches for every kernel version, like linux518.

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              • #8
                Originally posted by StarterX4 View Post

                Manjaro provides their scrollback patches for every kernel version, like linux518.
                This is seemingly not the same patch, as far as I can see they simply revert the patches which removed the scrollback buffer. Please correct me if I'm wrong.

                Originally posted by shmerl View Post
                What about true color support for the tty?
                But why?

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                • #9
                  Originally posted by birdie View Post
                  But why?
                  Why not? Low color terminal is ugly.

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                  • #10
                    Originally posted by shmerl View Post

                    Why not? Low color terminal is ugly.
                    Why do you need the text console anyways where you can have true colors in your Xorg/Wayland terminal?

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