initrd/bin/kexec-iso-init.sh: broaden display driver warning text

Replace technical jargon (DRM/KMS, i915, nouveau, etc.) with plain
language: 'ISO has no display driver - screen may be blank after boot'
The warning is for minimal distributions like CorePlus/TinyCore that
ship no KMS drivers for any GPU hardware.

Author: tlaurion

initrd/bin/kexec-iso-init.sh

@@ -365,22 +365,23 @@ if [ -s "$fs_compat_file" ] && ! grep -qF '[OK]' "$fs_compat_file"; then
 	fi
 fi
 
-# If no initrd confirmed a DRM/KMS display driver, warn that the
-# display may be blank after kexec.  Kernel boots but has no driver.
+# If no initrd confirmed a display driver (i915, nouveau, etc.), warn
+# that the screen may be blank after kexec — the kernel boots but has
+# no way to show output on the display without a KMS or fbdev driver.
 fb_compat_file="/tmp/kexec_fb_compat.txt"
 if [ -s "$fb_compat_file" ] && ! grep -qF '[OK]' "$fb_compat_file"; then
 	if [ -x /bin/whiptail ]; then
 		if ! whiptail_warning --title 'Display Driver Warning' --yesno \
-			"No Verified Display Driver\n\nNone of this ISO's initramfs images contain\na known DRM/KMS driver (i915, nouveau, amdgpu,\nbochs, etc.).\n\nThe display may be blank after kexec even if\nthe kernel boots successfully.\n\nCorePlus/TinyCore and similar minimal distributions\nare known to lack display drivers.\n\nProceed anyway?" \
+			"Unverified Display Support\n\nThe ISO's initramfs does not contain a\ndisplay driver for your hardware.\n\nThe screen may be blank after boot even\nif the operating system starts normally.\n\nThis is expected for minimal distributions\nsuch as CorePlus/TinyCore.\n\nProceed anyway?" \
 			0 80; then
-			DIE "No display driver - boot cancelled by user"
+			DIE "Boot cancelled by user"
 		fi
 	else
-		WARN "No DRM/KMS display driver found - display may be blank after kexec"
-		WARN "CorePlus/TinyCore and similar minimal distributions are known to lack display drivers"
+		WARN "ISO has no display driver - screen may be blank after boot"
+		WARN "This is expected for minimal distributions such as CorePlus/TinyCore"
 		INPUT "Proceed anyway? (y/N):" -n 1 response
 		if [ "$response" != "y" ] && [ "$response" != "Y" ]; then
-			DIE "No display driver - boot cancelled by user"
+			DIE "Boot cancelled by user"
 		fi
 	fi
 fi