feat(iso): add optional kms display boot path

bible-local/architecture/runtime-flows.md

@@ -60,6 +60,8 @@ Rules:
 - Chromium opens `http://localhost/` — the full interactive web UI
 - SSH is independent from the desktop path
 - serial console support is enabled for VM boot debugging
+- Default boot keeps the server-safe graphics path (`nomodeset` + forced `fbdev`) for IPMI/BMC consoles
+- Higher-resolution mode selection is expected only when booting through an explicit `bee.display=kms` menu entry, which disables the forced `fbdev` Xorg config before `lightdm`
 
 ## ISO build sequence
 

iso/builder/config/bootloaders/grub-pc/grub.cfg

@@ -14,6 +14,11 @@ menuentry "EASY-BEE" {
     initrd  @INITRD_LIVE@
 }
 
+menuentry "EASY-BEE (graphics/KMS)" {
+    linux   @KERNEL_LIVE@ @APPEND_LIVE@ bee.display=kms bee.nvidia.mode=normal net.ifnames=0 biosdevname=0 mitigations=off transparent_hugepage=always numa_balancing=disable nowatchdog nosoftlockup
+    initrd  @INITRD_LIVE@
+}
+
 menuentry "EASY-BEE (load to RAM)" {
     linux   @KERNEL_LIVE@ @APPEND_LIVE@ toram nomodeset bee.nvidia.mode=normal net.ifnames=0 biosdevname=0 mitigations=off transparent_hugepage=always numa_balancing=disable nowatchdog nosoftlockup
     initrd  @INITRD_LIVE@
@@ -24,6 +29,11 @@ menuentry "EASY-BEE (NVIDIA GSP=off)" {
     initrd  @INITRD_LIVE@
 }
 
+menuentry "EASY-BEE (graphics/KMS, GSP=off)" {
+    linux   @KERNEL_LIVE@ @APPEND_LIVE@ bee.display=kms bee.nvidia.mode=gsp-off net.ifnames=0 biosdevname=0 mitigations=off transparent_hugepage=always numa_balancing=disable nowatchdog nosoftlockup
+    initrd  @INITRD_LIVE@
+}
+
 menuentry "EASY-BEE (fail-safe)" {
     linux   @KERNEL_LIVE@ @APPEND_LIVE@ bee.nvidia.mode=gsp-off memtest noapic noapm nodma nomce nolapic nosmp vga=normal net.ifnames=0 biosdevname=0
     initrd  @INITRD_LIVE@

iso/builder/config/bootloaders/isolinux/live.cfg.in

@@ -5,6 +5,12 @@ label live-@FLAVOUR@-normal
     initrd @INITRD@
     append @APPEND_LIVE@ bee.nvidia.mode=normal
 
+label live-@FLAVOUR@-kms
+    menu label EASY-BEE (^graphics/KMS)
+    linux @LINUX@
+    initrd @INITRD@
+    append @APPEND_LIVE@ bee.display=kms bee.nvidia.mode=normal
+
 label live-@FLAVOUR@-toram
     menu label EASY-BEE (^load to RAM)
     linux @LINUX@
@@ -17,6 +23,12 @@ label live-@FLAVOUR@-gsp-off
     initrd @INITRD@
     append @APPEND_LIVE@ nomodeset bee.nvidia.mode=gsp-off
 
+label live-@FLAVOUR@-kms-gsp-off
+    menu label EASY-BEE (g^raphics/KMS, GSP=off)
+    linux @LINUX@
+    initrd @INITRD@
+    append @APPEND_LIVE@ bee.display=kms bee.nvidia.mode=gsp-off
+
 label live-@FLAVOUR@-failsafe
     menu label EASY-BEE (^fail-safe)
     linux @LINUX@

iso/overlay/etc/systemd/system/lightdm.service.d/bee-display-mode.conf

@@ -0,0 +1,6 @@
+[Unit]
+Wants=bee-preflight.service
+After=bee-preflight.service
+
+[Service]
+ExecStartPre=/usr/local/bin/bee-display-mode

iso/overlay/usr/local/bin/bee-display-mode

@@ -0,0 +1,54 @@
+#!/bin/sh
+# Select Xorg display mode based on kernel cmdline.
+# Default is the current server-safe path: keep forced fbdev.
+set -eu
+
+cmdline_param() {
+    key="$1"
+    for token in $(cat /proc/cmdline 2>/dev/null); do
+        case "$token" in
+            "$key"=*)
+                echo "${token#*=}"
+                return 0
+                ;;
+        esac
+    done
+    return 1
+}
+
+log() {
+    echo "bee-display-mode: $*"
+}
+
+mode="$(cmdline_param bee.display || true)"
+if [ -z "$mode" ]; then
+    mode="safe"
+fi
+
+xorg_dir="/etc/X11/xorg.conf.d"
+fbdev_conf="${xorg_dir}/10-fbdev.conf"
+fbdev_park="${xorg_dir}/10-fbdev.conf.disabled"
+
+mkdir -p "$xorg_dir"
+
+case "$mode" in
+    kms|auto)
+        if [ -f "$fbdev_conf" ]; then
+            mv "$fbdev_conf" "$fbdev_park"
+            log "mode=${mode}; disabled forced fbdev config"
+        else
+            log "mode=${mode}; fbdev config already disabled"
+        fi
+        ;;
+    safe|fbdev|"")
+        if [ -f "$fbdev_park" ] && [ ! -f "$fbdev_conf" ]; then
+            mv "$fbdev_park" "$fbdev_conf"
+            log "mode=${mode}; restored forced fbdev config"
+        else
+            log "mode=${mode}; keeping forced fbdev config"
+        fi
+        ;;
+    *)
+        log "unknown bee.display=${mode}; keeping forced fbdev config"
+        ;;
+esac