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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Hans de Goede <hdegoede@redhat.com>
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Date: Fri, 28 Jan 2022 12:43:48 +0100
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Subject: [PATCH] EFI: console: Do not set colorstate until the first text
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output
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GRUB_MOD_INIT(normal) does an unconditional:
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grub_env_set ("color_normal", "light-gray/black");
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which triggers a grub_term_setcolorstate() call. The original version
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of the "efi/console: Do not set text-mode until we actually need it" patch:
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https://lists.gnu.org/archive/html/grub-devel/2018-03/msg00125.html
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Protected against this by caching the requested state in
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grub_console_setcolorstate () and then only applying it when the first
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text output actually happens. During refactoring to move the
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grub_console_setcolorstate () up higher in the grub-core/term/efi/console.c
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file the code to cache the color-state + bail early was accidentally
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dropped.
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Restore the cache the color-state + bail early behavior from the original.
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Cc: Javier Martinez Canillas <javierm@redhat.com>
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Fixes: 2d7c3abd871f ("efi/console: Do not set text-mode until we actually need it")
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Signed-off-by: Hans de Goede <hdegoede@redhat.com>
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---
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grub-core/term/efi/console.c | 10 ++++++++++
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1 file changed, 10 insertions(+)
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diff --git a/grub-core/term/efi/console.c b/grub-core/term/efi/console.c
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index 2f1ae85ba7..c44b2ac318 100644
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--- a/grub-core/term/efi/console.c
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+++ b/grub-core/term/efi/console.c
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@@ -82,6 +82,16 @@ grub_console_setcolorstate (struct grub_term_output *term
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{
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grub_efi_simple_text_output_interface_t *o;
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+ if (grub_efi_is_finished || text_mode != GRUB_TEXT_MODE_AVAILABLE)
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+ {
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+ /*
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+ * Cache colorstate changes before the first text-output, this avoids
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+ * "color_normal" environment writes causing a switch to textmode.
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+ */
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+ text_colorstate = state;
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+ return;
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+ }
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+
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if (grub_efi_is_finished)
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return;
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