Remove the patch supporting multiple TTYs, and update the Xorg configuration to disable VT switching

distro/etc_nixos/overlays/desktop/default.nix

@@ -5,10 +5,8 @@ self: super:
     xorgserver = super.xorg.xorgserver.overrideAttrs (oldAttrs: {
       version = "21.1.4";
       src = oldAttrs.src;
-      patches = (oldAttrs.patches or [ ]) ++ [
+      patches = (oldAttrs.patches or [ ])
-        ./patches/xorgServer/0001-Skip-checking-graphics-under-sys.patch
+        ++ [ ./patches/xorgServer/0001-Skip-checking-graphics-under-sys.patch ];
-        ./patches/xorgServer/0002-hardcode-tty1-usage-due-to-Asterinas-limitations.patch
-      ];
       nativeBuildInputs = (oldAttrs.nativeBuildInputs or [ ])
         ++ [ self.meson self.ninja self.pkg-config ];
       buildInputs = (oldAttrs.buildInputs or [ ]) ++ [

distro/etc_nixos/overlays/desktop/patches/xorgServer/0002-hardcode-tty1-usage-due-to-Asterinas-limitations.patch

@@ -1,101 +0,0 @@
-From 16f92eda2d20d675fd5bab24771e78350fc75b8e Mon Sep 17 00:00:00 2001
-From: Wei Zhang <ruoyuan.zw@antgroup.com>
-Date: Wed, 17 Sep 2025 16:05:54 +0800
-Subject: [PATCH] hardcode tty1 usage due to Asterinas limitations
-
-Asterinas currently only supports /dev/tty1 and lacks multi-tty device
-support. This patch:
-
-- Forces Xorg to use exclusively /dev/tty1
-- Skips ioctl calls intended for tty device switching
-- Maintains functionality while avoiding unsupported operations
-
-The changes ensure Xorg remains operational on Asterinas without
-attempting to access non-existent tty devices or perform unsupported
-tty switching operations.
-
-Signed-off-by: Wei Zhang <ruoyuan.zw@antgroup.com>
----
- hw/xfree86/os-support/linux/lnx_init.c | 26 ++++++++++++++++++++++----
- 1 file changed, 22 insertions(+), 4 deletions(-)
-
-diff --git a/hw/xfree86/os-support/linux/lnx_init.c b/hw/xfree86/os-support/linux/lnx_init.c
-index 111b3b4..22163ce 100644
---- a/hw/xfree86/os-support/linux/lnx_init.c
-+++ b/hw/xfree86/os-support/linux/lnx_init.c
-@@ -106,6 +106,15 @@ linux_parse_vt_settings(int may_fail)
-         from = X_CMDLINE;
-     }
-     else {
-+        /*
-+         * NOTE: In Asterinas, the number of TTYs is hardcoded, because the
-+         * current implementation of Asterinas does not support multiple TTYs.
-+         * Currently, only /dev/tty1 is supported.
-+         *
-+         * Todo: Update this logic if multi-TTY support is added in the future.
-+         */
-+        xf86Info.vtno = 1;
-+#if 0
-         fd = open("/dev/tty0", O_WRONLY, 0);
-         if (fd < 0) {
-             if (may_fail)
-@@ -139,6 +148,7 @@ linux_parse_vt_settings(int may_fail)
-             }
-         }
-         close(fd);
-+#endif
-     }
-
-     xf86Msg(from, "using VT number %d\n\n", xf86Info.vtno);
-@@ -204,15 +214,13 @@ xf86OpenConsole(void)
-         i = 0;
-         while (vcs[i] != NULL) {
-             snprintf(vtname, sizeof(vtname), vcs[i], xf86Info.vtno);    /* /dev/tty1-64 */
-+            xf86Msg(X_WARNING, "xf86OpenConsole: trying to open %s\n", vtname);
-             if ((xf86Info.consoleFd = open(vtname, O_RDWR | O_NDELAY, 0)) >= 0)
-                 break;
-             i++;
-         }
-
--        if (xf86Info.consoleFd < 0)
--            FatalError("xf86OpenConsole: Cannot open virtual console"
--                       " %d (%s)\n", xf86Info.vtno, strerror(errno));
--
-+#if 0
-         /*
-          * Linux doesn't switch to an active vt after the last close of a vt,
-          * so we do this ourselves by remembering which is active now.
-@@ -223,10 +231,17 @@ xf86OpenConsole(void)
-                     strerror(errno));
-         else
-             activeVT = vts.v_active;
-+#endif
-
-         if (!xf86Info.ShareVTs) {
-             struct termios nTty;
-
-+        SYSCALL(ret = ioctl(xf86Info.consoleFd, KDSETMODE, KD_GRAPHICS));
-+            if (ret < 0)
-+                FatalError("xf86OpenConsole: KDSETMODE KD_GRAPHICS failed %s\n",
-+                           strerror(errno));
-+        xf86Msg(X_WARNING, "xf86OpenConsole: KDSETMODE to KD_GRAPHICS\n");
-+#if 0
-             /*
-              * now get the VT.  This _must_ succeed, or else fail completely.
-              */
-@@ -282,9 +297,12 @@ xf86OpenConsole(void)
-             cfsetispeed(&nTty, 9600);
-             cfsetospeed(&nTty, 9600);
-             tcsetattr(xf86Info.consoleFd, TCSANOW, &nTty);
-+#endif
-         }
-     }
-     else {                      /* serverGeneration != 1 */
-+        xf86Msg(X_WARNING, "xf86Info.ShareVTs %d, xf86Info.autoVTSwitch %d\n",
-+                xf86Info.ShareVTs, xf86Info.autoVTSwitch);
-         if (!xf86Info.ShareVTs && xf86Info.autoVTSwitch) {
-             /* now get the VT */
-             if (!switch_to(xf86Info.vtno, "xf86OpenConsole"))
---
-2.43.0
-

distro/etc_nixos/overlays/desktop/patches/xorgServer/10-fbdev.conf

@@ -16,7 +16,6 @@ EndSection
 
 Section "ServerFlags"
     Option      "AutoAddDevices" "on"  # Enable automatic input device detection
-    Option      "DontVTSwitch" "true"    # Disable VT switching (avoid hangs)
     Option      "AutoEnableDevices" "on"
 EndSection