Set thread priorities without using RTKit.
Disable v4l2 module.

Signed-off-by: Windsome Zeng <windsome.zeng@starfivetech.com>

diff -purN a/media-session.d/alsa-monitor.conf b/media-session.d/alsa-monitor.conf
--- a/media-session.d/alsa-monitor.conf	2022-10-13 16:59:41.918942274 +0800
+++ b/media-session.d/alsa-monitor.conf	2022-10-13 16:51:03.885741470 +0800
@@ -12,7 +12,7 @@ properties = {
     #alsa.jack-device = false
 
     # Reserve devices.
-    #alsa.reserve = true
+    alsa.reserve = false
 }
 
 rules = [
diff -purN a/media-session.d/media-session.conf b/media-session.d/media-session.conf
--- a/media-session.d/media-session.conf	2022-10-13 16:59:41.918942274 +0800
+++ b/media-session.d/media-session.conf	2022-10-13 16:51:03.885741470 +0800
@@ -33,12 +33,23 @@ context.modules = [
     # If nofail is given, module initialization failures are ignored.
     #
     # Uses RTKit to boost the data thread priority.
-    { name = libpipewire-module-rtkit
+    #{ name = libpipewire-module-rtkit
+    #    args = {
+    #        #nice.level   = -11
+    #        #rt.prio      = 88
+    #        #rt.time.soft = 2000000
+    #        #rt.time.hard = 2000000
+    #    }
+    #    flags = [ ifexists nofail ]
+    #}
+
+    # Set thread priorities without using RTKit.
+    { name = libpipewire-module-rt
         args = {
-            #nice.level   = -11
-            #rt.prio      = 88
-            #rt.time.soft = 2000000
-            #rt.time.hard = 2000000
+            nice.level   = -11
+            rt.prio      = 88
+            rt.time.soft = 2000000
+            rt.time.hard = 2000000
         }
         flags = [ ifexists nofail ]
     }
@@ -75,7 +86,7 @@ session.modules = {
     default = [
         flatpak                 # manages flatpak access
         portal                  # manage portal permissions
-        v4l2                    # video for linux udev detection
+        #v4l2                    # video for linux udev detection
         #libcamera              # libcamera udev detection
         suspend-node            # suspend inactive nodes
         policy-node             # configure and link nodes