xorg: remove obsoleted code and rework caching for autoprobed devices to speed up boot

postplug.d/30xorg

@@ -18,8 +18,6 @@ me="xorg"
 
 XORGCONF=/etc/X11/xorg.conf
 
-kernel_min=$(uname -r | sed -e 's,[^\.]*\.,,' -e 's,\..*,,')
-
 # xorg_section_screen_config()
 #    write a new xorg configuration
 # args:
@@ -71,26 +69,6 @@ else
 fi
 }
 
-# xorg_configure_loginmanager()
-#    configure inittab for runlelve 5 init and kdm as loginmanager 
-function xorg_configure_loginmanager() {
-
-    # login_manager configuration
-    [ ! "`grep "^x:5:" /etc/inittab`" ] && {
-       cat >> /etc/inittab << _EOF
-
-# run graphical login manager
-x:5:respawn:login_manager
-_EOF
-
-   # configure kdm as the default login_manager if none is set
-   /usr/sbin/alternatives --display login_manager >/dev/null ||
-   /usr/sbin/alternatives --install /usr/sbin/login_manager login_manager /opt/kde/bin/kdm 20
-
-   telinit q
-   }
-}
-
 function xorg_d_configure_input() {
    # Keyboard configuration (Xorg >= 1.8 uses /etc/X11/xorg.conf.d)
    [ ! -e /etc/X11/xorg.conf.d/10-keyboard.conf -o \
@@ -169,6 +147,7 @@ if [ -e /dev/nvhost-ctrl ]; then
    VIDEO_DEV="NVIDIA TEGRA"
 else
    VIDEO_DEV="`lspci -n 2>/dev/null | grep " 03[0-9][0-9]: "`"
+   [ "$VIDEO_DEV" ] || VIDEO_DEV="embedded-unknown"
 fi
 
 if [ -e $XORGCONF -a -e $postpluglibdir/xorg.cache ]; then
@@ -242,11 +221,7 @@ if [ ! -e $XORGCONF ]; then
       RET=$?
       if [ $RET -ne 0 -o ! -e /tmp/xorg.conf.new ]; then
          logmsg "$me" "warning: xorg autoprobed configuration failed; using xorg autoconfig"
-         VIDEO_DEV="autoprobe"
          echo "# Dummy empty xorg.conf file created by postplug" > $XORGCONF
-         xorg_configure_loginmanager
-         xorg_d_configure_input
-         exit 1
       else
          mv /tmp/xorg.conf.new $XORGCONF
          sed -i "s|#DisplaySize|DisplaySize|" $XORGCONF
@@ -255,16 +230,12 @@ if [ ! -e $XORGCONF ]; then
       fi
    fi
    let "CONFCREATED = 1"
-
-fi
-
-DISPLAYSIZE="`sed -n "/Section[ \t]\"Monitor\"/,/EndSection/{s/[ \t]*DisplaySize[ \t]*\(.*\)/\1/p}" $XORGCONF`"
    VIDEODRIVERS=(`sed -n "/Section[ \t]\"Device\"/,/EndSection/{s/^[ \t]*Driver[ \t]*\"\(.*\)\"/\1/p}" $XORGCONF`)
-
    # assume first driver as default videodriver
    VIDEODRIVER=${VIDEODRIVERS[0]}
+fi
 
-if [ "$CONFCREATED" = "1" ]; then
+if [ "$CONFCREATED" = "1" -a "$VIDEODRIVER" ]; then
 
    [ "`grep nomodeset /proc/cmdline`" ] && nomodeset=1
 
@@ -316,10 +287,6 @@ if [ "$CONFCREATED" = "1" ]; then
     #    HorizSync    ${HORIZSYNCMIN[$reasonable]}-${HORIZSYNCMAX[$reasonable]}" \
     #     $XORGCONF
    #else
-   #if [ ! "$DISPLAYSIZE" ]; then
-    #  sed -i -e '/Section\W*"Monitor"/a\
-    #    DisplaySize  320 240' $XORGCONF
-   #fi
 
    case "$VIDEODRIVER" in
       vesa|vga) sed -i -e '/Section "Screen"/a\
@@ -481,6 +448,9 @@ warning: DDC hsync range cannot be detected, setting default of 30-49 kHz"
    fi
 fi
 
+[ "$VIDEO_DEV" -a "$VIDEO_DEV" != "$VIDEO_DEV_CACHED" ] &&
+   echo "$VIDEO_DEV" > $postpluglibdir/xorg.cache
+
 ####################################
 #
 # Xorg dynamic configuration section
@@ -492,13 +462,7 @@ if [ -e /sys/class/drm/card0/device/power_profile ]; then
    echo mid > /sys/class/drm/card0/device/power_profile
 fi
 
-[ -e $XORGCONF ] || {
+[ -e $XORGCONF -a "$VIDEODRIVER" ] || exit 0
-   logmsg "$me" "error: "$"missing Xorg configuration file; aborting"
-   exit 1
-}
-
-# configure inittab for login manager
-xorg_configure_loginmanager
 
 # add missing brackets to Xorg.conf device entries
 sed -i "s|^[ \t]*Driver[ \t]*\([A-Za-z0-9]*\)[ \t]*$|        Driver      \"\1\"|g" $XORGCONF
@@ -549,7 +513,4 @@ sed -i "s|^\([[:space:]]*InputDevice\W*\"Keyboard0\".*\)|#\1|" $XORGCONF
 # FIXME: delete empty lines
 sed -i '/./,$!d' $XORGCONF
 
-[ "$CONFCREATED" = "1" -o ! -e $postpluglibdir/xorg.cache ] && \
-   echo "$VIDEO_DEV" > $postpluglibdir/xorg.cache
-
 exit 0