[WIP] Updates: reduce PR complexity

.golangci.yml

@@ -42,4 +42,3 @@ formatters:
       - third_party$
       - builtin$
       - examples$
-

.vscode/settings.json

@@ -3,6 +3,5 @@
     "cva",
     "cx"
   ],
-  "git.ignoreLimitWarning": true,
+  "git.ignoreLimitWarning": true
-  "cmake.ignoreCMakeListsMissing": true
 }

display.go

@@ -326,8 +326,11 @@ func startBacklightTickers() {
 		dimTicker = time.NewTicker(time.Duration(config.DisplayDimAfterSec) * time.Second)
 
 		go func() {
-			for range dimTicker.C {
+			for { //nolint:staticcheck
-				tick_displayDim()
+				select {
+				case <-dimTicker.C:
+					tick_displayDim()
+				}
 			}
 		}()
 	}
@@ -337,8 +340,11 @@ func startBacklightTickers() {
 		offTicker = time.NewTicker(time.Duration(config.DisplayOffAfterSec) * time.Second)
 
 		go func() {
-			for range offTicker.C {
+			for { //nolint:staticcheck
-				tick_displayOff()
+				select {
+				case <-offTicker.C:
+					tick_displayOff()
+				}
 			}
 		}()
 	}

internal/usbgadget/hid_keyboard.go

@@ -321,7 +321,8 @@ func (u *UsbGadget) keyboardWriteHidFile(modifier byte, keys []byte) error {
 	_, err := u.writeWithTimeout(u.keyboardHidFile, append([]byte{modifier, 0x00}, keys[:hidKeyBufferSize]...))
 	if err != nil {
 		u.logWithSuppression("keyboardWriteHidFile", 100, u.log, err, "failed to write to hidg0")
-		// Keep file open on write errors to reduce I/O overhead
+		u.keyboardHidFile.Close()
+		u.keyboardHidFile = nil
 		return err
 	}
 	u.resetLogSuppressionCounter("keyboardWriteHidFile")

internal/usbgadget/hid_mouse_absolute.go

@@ -77,7 +77,8 @@ func (u *UsbGadget) absMouseWriteHidFile(data []byte) error {
 	_, err := u.writeWithTimeout(u.absMouseHidFile, data)
 	if err != nil {
 		u.logWithSuppression("absMouseWriteHidFile", 100, u.log, err, "failed to write to hidg1")
-		// Keep file open on write errors to reduce I/O overhead
+		u.absMouseHidFile.Close()
+		u.absMouseHidFile = nil
 		return err
 	}
 	u.resetLogSuppressionCounter("absMouseWriteHidFile")

internal/usbgadget/hid_mouse_relative.go

@@ -60,14 +60,15 @@ func (u *UsbGadget) relMouseWriteHidFile(data []byte) error {
 		var err error
 		u.relMouseHidFile, err = os.OpenFile("/dev/hidg2", os.O_RDWR, 0666)
 		if err != nil {
-			return fmt.Errorf("failed to open hidg2: %w", err)
+			return fmt.Errorf("failed to open hidg1: %w", err)
 		}
 	}
 
 	_, err := u.writeWithTimeout(u.relMouseHidFile, data)
 	if err != nil {
 		u.logWithSuppression("relMouseWriteHidFile", 100, u.log, err, "failed to write to hidg2")
-		// Keep file open on write errors to reduce I/O overhead
+		u.relMouseHidFile.Close()
+		u.relMouseHidFile = nil
 		return err
 	}
 	u.resetLogSuppressionCounter("relMouseWriteHidFile")

terminal.go

@@ -6,7 +6,6 @@ import (
 	"io"
 	"os"
 	"os/exec"
-	"runtime"
 
 	"github.com/creack/pty"
 	"github.com/pion/webrtc/v4"
@@ -34,10 +33,6 @@ func handleTerminalChannel(d *webrtc.DataChannel) {
 		}
 
 		go func() {
-			// Lock to OS thread to isolate PTY I/O
-			runtime.LockOSThread()
-			defer runtime.UnlockOSThread()
-
 			buf := make([]byte, 1024)
 			for {
 				n, err := ptmx.Read(buf)