[gentoo-user] console scrollback (kernel 5.14)

[Jorge Almeida]

Hello, gentooers in general and Alan in particular

I've been using Alan Mackenzie's patch until kernel 5.13, with
success. It failed with 5.14.4 --yes, I know, but it doesn't hurt to
try :)

Jorge Almeida

Just in case it is useful:

(Stripping trailing CRs from patch; use --binary to disable.)
patching file ./include/linux/vt_kern.h
Hunk #1 succeeded at 115 (offset -12 lines).
(Stripping trailing CRs from patch; use --binary to disable.)
patching file ./include/linux/console_struct.h
Hunk #1 succeeded at 110 (offset 1 line).
(Stripping trailing CRs from patch; use --binary to disable.)
patching file ./drivers/video/fbdev/core/fbcon.c
Hunk #1 succeeded at 3053 with fuzz 2 (offset -31 lines).
(Stripping trailing CRs from patch; use --binary to disable.)
patching file ./drivers/video/console/Kconfig
(Stripping trailing CRs from patch; use --binary to disable.)
patching file ./drivers/tty/vt/vt.c
Hunk #11 succeeded at 1358 with fuzz 2.
Hunk #12 succeeded at 1454 (offset -1 lines).
Hunk #13 succeeded at 1519 (offset -1 lines).
Hunk #16 FAILED at 3264.
Hunk #18 succeeded at 3709 (offset -7 lines).
Hunk #19 succeeded at 3736 (offset -7 lines).
Hunk #20 succeeded at 3797 (offset -7 lines).
Hunk #21 succeeded at 4497 (offset -8 lines).
Hunk #22 succeeded at 4798 (offset -8 lines).
1 out of 22 hunks FAILED -- saving rejects to file ./drivers/tty/vt/vt.c.rej
## cat ./drivers/tty/vt/vt.c.rej
--- ./drivers/tty/vt/vt.c.orig  2020-12-13 22:41:30.000000000 +0000
+++ ./drivers/tty/vt/vt.c       2021-04-05 16:20:32.624563241 +0000
@@ -3264,6 +3640,14 @@

        param.vc = vc;

+       /* NEW STOUGH, 2021-04-03 */
+#ifdef CONFIG_FRAMEBUFFER_CONSOLE_SOFT_SCROLLBACK
+       /* Undo any soft scrolling - <Alt><Fn> and <Shift><PgUp/Down> do
+          not pass through this function.  */
+       concon_set_origin (vc);
+#endif
+       /* END OF NEW STOUGH */
+
        while (!tty->stopped && count) {
                int orig = *buf;
                buf++;