feat(windows): the brand reads Punktfunk on every device Windows shows

Device Manager, the firewall list and the monitor name all said "punktfunk". The brand
is Punktfunk.

Renamed: the [Strings] blocks of all four driver INFs (device descriptions, install
disks, provider, manufacturer), the `description` on every SwDeviceProfile the host
creates, pf-mouse's HID manufacturer + product strings, pf-vdisplay's IddCx endpoint
friendly + manufacturer names, the EDID 0xFC display-name descriptor — so Windows now
shows `Generic Monitor (Punktfunk)` — and the netsh firewall rule names.

The EDID edit is a single byte (0x70 -> 0x50) and needs no hand-patched checksum:
Edid::generate_with already recomputes both block checksums after patching the serial.

Deliberately left lowercase, because these are IDENTITIES rather than display names and
renaming them would orphan installed state:

  * the SwDeviceCreate enumerator `w!("punktfunk")` — it IS the SWD\PUNKTFUNK\... path
    every pad instance id is built from
  * pf-paths' `join("punktfunk")` — C:\ProgramData\punktfunk
  * the CN=punktfunk-driver cert subject, which purge_driver_certs and both driver build
    scripts match by string
  * install.rs' `lo.contains("punktfunk virtual display")` probes, whose haystack is
    to_ascii_lowercase()d, so they already match the capitalised name

Nothing is orphaned by the renames that DID happen either: netsh rule names,
Get-NetFirewallRule -DisplayName and PowerShell's -match are all case-insensitive, so
the firewall delete paths and reset-pf-vdisplay.ps1's -AdapterName / -GhostMatch
defaults still reap what every release up to 0.22.1 created.

Cosmetic, with two consequences worth knowing: it takes a driver rebuild + re-sign to
appear at all, and an existing devnode keeps its cached FriendlyName until it is
recreated.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

crates/pf-inject/src/inject/windows/dualsense_windows.rs

@@ -393,7 +393,7 @@ impl WinDsIdentity {
             // child, no channel proof, and a pad no game ever saw. `hwid_matches_inf` pins it now.
             hwid: "pf_dualsense",
             usb_vid_pid: "VID_054C&PID_0CE6",
-            description: "punktfunk Virtual DualSense",
+            description: "Punktfunk Virtual DualSense",
         }
     }
 
@@ -403,7 +403,7 @@ impl WinDsIdentity {
             instance_prefix: "pf_edge",
             hwid: "pf_dualsenseedge",
             usb_vid_pid: "VID_054C&PID_0DF2",
-            description: "punktfunk Virtual DualSense Edge",
+            description: "Punktfunk Virtual DualSense Edge",
         }
     }
 }
@@ -644,7 +644,7 @@ pub fn deck_spike_hold(index: u8, secs: u64) -> Result<()> {
         // The Deck's controller interface — the promotion gate the first spike run hit
         // (hidapi parses MI_ from the child hwids; absent = interface 0, Steam wants 2).
         usb_mi: Some(2),
-        description: "punktfunk Virtual Steam Deck (spike)",
+        description: "Punktfunk Virtual Steam Deck (spike)",
     })?;
     // The spike drives a real pad channel, so it takes the same devnode-proved delivery a session
     // pad does — no special case, and no reason for a bring-up tool to run on the old trust.

crates/pf-inject/src/inject/windows/dualshock4_windows.rs

@@ -73,7 +73,7 @@ impl Ds4WinPad {
             hwid: DS4_HWID,
             usb_vid_pid: "VID_054C&PID_09CC",
             usb_mi: None,
-            description: "punktfunk Virtual DualShock 4",
+            description: "Punktfunk Virtual DualShock 4",
         })?; // Propagate, do NOT swallow — see below.
         let (hsw, instance_id) = (Some(hsw), instance_id);
         // Swallowing a create failure here (the previous behaviour) latched the pad slot to

crates/pf-inject/src/inject/windows/gamepad_windows.rs

@@ -56,7 +56,7 @@ fn create_swdevice(index: u8) -> Result<(HSWDEVICE, Option<String>)> {
         .encode_utf16()
         .chain(std::iter::once(0))
         .collect();
-    let desc: Vec<u16> = "punktfunk Virtual Xbox 360 (XUSB)"
+    let desc: Vec<u16> = "Punktfunk Virtual Xbox 360 (XUSB)"
         .encode_utf16()
         .chain(std::iter::once(0))
         .collect();

crates/pf-inject/src/inject/windows/mouse_windows.rs

@@ -66,7 +66,7 @@ impl VirtualMouse {
             // a mouse (nothing fingerprints them); reusing the shared profile keeps one code path.
             usb_vid_pid: "VID_5046&PID_4D4F",
             usb_mi: None,
-            description: "punktfunk Virtual Mouse",
+            description: "Punktfunk Virtual Mouse",
         }) {
             Ok((h, i)) => (Some(h), i),
             Err(e) => {
@@ -386,7 +386,7 @@ pub fn channel_proof_probe() -> Result<()> {
         hwid: "pf_mouse",
         usb_vid_pid: "VID_5046&PID_4D4F",
         usb_mi: None,
-        description: "punktfunk Virtual Mouse (channel-proof probe)",
+        description: "Punktfunk Virtual Mouse (channel-proof probe)",
     })?;
     let _sw = super::gamepad_raii::SwDevice::new(hsw);
     let Some(instance_id) = instance_id else {

crates/pf-inject/src/inject/windows/steam_deck_windows.rs

@@ -80,7 +80,7 @@ impl DeckWinPad {
             // token, hidapi reports interface 0, and Steam never claims the pad (the N4
             // spike's run-1 failure).
             usb_mi: Some(2),
-            description: "punktfunk Virtual Steam Deck",
+            description: "Punktfunk Virtual Steam Deck",
         })?; // Propagate — swallowing latched the slot to a pad with no devnode (see the DS4 twin).
         let (hsw, instance_id) = (Some(hsw), instance_id);
         // The DATA section goes to whoever THIS devnode says is serving it — not to whatever pid

crates/pf-vdisplay/src/vdisplay/windows/pf_vdisplay.rs

@@ -92,7 +92,7 @@ unsafe fn ioctl(h: HANDLE, code: u32, input: &[u8], output: &mut [u8]) -> Result
 }
 
 /// Reap the ghost (NOT-present) "punktfunk" virtual-monitor device nodes that `IddCxMonitorDeparture`
-/// leaves behind. Each departed monitor leaves a not-present "Generic Monitor (punktfunk)" PDO that keeps
+/// leaves behind. Each departed monitor leaves a not-present "Generic Monitor (Punktfunk)" PDO that keeps
 /// pinning an OS VidPN target against the IddCx adapter's fixed monitor-slot budget; once ~16 accumulate,
 /// `IOCTL_ADD` wedges at 0x80070490 (`ERROR_NOT_FOUND`) and every session black-screens until a manual
 /// reset/reboot. Removing the not-present PDOs frees the slots — the in-process equivalent of
@@ -532,7 +532,7 @@ impl VdisplayDriver for PfVdisplayDriver {
             tracing::warn!("pf-vdisplay IOCTL_CLEAR_ALL failed on startup (continuing)");
         }
         // CLEAR_ALL only departs the driver's own (in-process) monitor list; it can NOT remove the
-        // OS-side not-present "Generic Monitor (punktfunk)" PDOs that a previous host-run's monitor
+        // OS-side not-present "Generic Monitor (Punktfunk)" PDOs that a previous host-run's monitor
         // departures left behind. Reap those here so a fresh host start begins with a clean IddCx
         // monitor-slot budget — prevents the 0x80070490 slot-exhaustion wedge from carrying across
         // restarts (the reason a restart's CLEAR_ALL alone never recovered it before).

crates/punktfunk-host/src/windows/install.rs

@@ -471,7 +471,7 @@ fn web_setup(args: &[String]) -> Result<()> {
             "firewall",
             "delete",
             "rule",
-            "name=punktfunk web console (TCP 47992)",
+            "name=Punktfunk web console (TCP 47992)",
         ],
     );
     if !run_quiet(
@@ -481,7 +481,7 @@ fn web_setup(args: &[String]) -> Result<()> {
             "firewall",
             "add",
             "rule",
-            "name=punktfunk web console (TCP 47992)",
+            "name=Punktfunk web console (TCP 47992)",
             "dir=in",
             "action=allow",
             "protocol=TCP",

crates/punktfunk-host/src/windows/service.rs

@@ -995,7 +995,7 @@ fn add_firewall_rules(allow_public: bool) {
         ("UDP", "UDP", "47998-48010,9777,5353"),
     ];
     for (suffix, proto, ports) in rules {
-        let name = format!("punktfunk {suffix}");
+        let name = format!("Punktfunk {suffix}");
         let ok = run_quiet(
             "netsh",
             &[
@@ -1028,7 +1028,9 @@ fn add_firewall_rules(allow_public: bool) {
 
 fn remove_firewall_rules() {
     for suffix in ["TCP", "UDP"] {
-        let name = format!("punktfunk {suffix}");
+        // Capital P is the brand; netsh matches a rule name case-INSENSITIVELY, so this still
+        // reaps the lowercase rules every release up to 0.22.1 created — no orphans on upgrade.
+        let name = format!("Punktfunk {suffix}");
         let _ = run_quiet(
             "netsh",
             &[

packaging/windows/drivers/pf-gamepad/pf_gamepad.inx

@@ -90,13 +90,13 @@ ServiceBinary="%13%\pf_gamepad.dll"
 pf_gamepad.dll
 
 [Strings]
-ProviderString     ="punktfunk"
-ManufacturerString ="punktfunk"
+ProviderString     ="Punktfunk"
+ManufacturerString ="Punktfunk"
 ClassName          ="HID device"
-Disk_Description   ="punktfunk Gamepad Installation Disk"
+Disk_Description   ="Punktfunk Gamepad Installation Disk"
 ; One per hardware id — these are what Device Manager shows. Keep them aligned with the product
 ; strings the driver serves per device_type (src/lib.rs `on_get_string`).
-DeviceDesc         ="punktfunk Virtual DualSense"
-DeviceDescDS4      ="punktfunk Virtual DualShock 4"
-DeviceDescEdge     ="punktfunk Virtual DualSense Edge"
-DeviceDescDeck     ="punktfunk Virtual Steam Deck Controller"
+DeviceDesc         ="Punktfunk Virtual DualSense"
+DeviceDescDS4      ="Punktfunk Virtual DualShock 4"
+DeviceDescEdge     ="Punktfunk Virtual DualSense Edge"
+DeviceDescDeck     ="Punktfunk Virtual Steam Deck Controller"

packaging/windows/drivers/pf-mouse/pf_mouse.inx

@@ -72,8 +72,8 @@ ServiceBinary="%13%\pf_mouse.dll"
 pf_mouse.dll
 
 [Strings]
-ProviderString     ="punktfunk"
-ManufacturerString ="punktfunk"
+ProviderString     ="Punktfunk"
+ManufacturerString ="Punktfunk"
 ClassName          ="HID device"
-Disk_Description   ="punktfunk Mouse Installation Disk"
-DeviceDesc         ="punktfunk Virtual Mouse"
+Disk_Description   ="Punktfunk Mouse Installation Disk"
+DeviceDesc         ="Punktfunk Virtual Mouse"

packaging/windows/drivers/pf-mouse/src/lib.rs

@@ -428,14 +428,14 @@ fn on_get_string(request: &Request) -> NTSTATUS {
     };
     let string_id = id_val & 0xFFFF;
     let s: String = match string_id {
-        0 | 0x000E => "punktfunk".into(),
+        0 | 0x000E => "Punktfunk".into(),
         // (2) The SERIAL carries the channel proof — the one transport measured to reach a UMDF HID
         // minidriver from user mode (`HidD_GetSerialNumberString`, zero-access handle, verified on
         // .173). Safe HERE and only here: nothing reads the virtual mouse's serial, whereas the pads'
         // serials are what SDL and Steam dedup controllers on. The old value was the inert
         // "PFMOUSE00"; the proof text is just as inert and does the security work.
         2 | 0x0010 => ChannelProof::new(CHANNEL.index(), std::process::id()).to_hid_string(),
-        _ => "punktfunk Virtual Mouse".into(),
+        _ => "Punktfunk Virtual Mouse".into(),
     };
     let mut wide: Vec<u8> = Vec::with_capacity(s.len() * 2 + 2);
     for u in s.encode_utf16() {

packaging/windows/drivers/pf-vdisplay/pf_vdisplay.inx

@@ -75,10 +75,10 @@ UMDriverCopy=12,UMDF
 pf_vdisplay.dll
 
 [Strings]
-ManufacturerName="punktfunk"
-DiskName="punktfunk Virtual Display Installation Disk"
+ManufacturerName="Punktfunk"
+DiskName="Punktfunk Virtual Display Installation Disk"
 WudfRdDisplayName="Windows Driver Foundation - User-mode Driver Framework Reflector"
-DeviceName="punktfunk Virtual Display"
+DeviceName="Punktfunk Virtual Display"
 
 REG_MULTI_SZ=0x00010000
 REG_SZ=0x00000000

packaging/windows/drivers/pf-vdisplay/src/adapter.rs

@@ -82,8 +82,8 @@ pub fn init_adapter(device: WDFDEVICE) -> NTSTATUS {
     diag.Size = core::mem::size_of::<iddcx::IDDCX_ENDPOINT_DIAGNOSTIC_INFO>() as u32;
     diag.GammaSupport = iddcx::IDDCX_FEATURE_IMPLEMENTATION::IDDCX_FEATURE_IMPLEMENTATION_NONE;
     diag.TransmissionType = iddcx::IDDCX_TRANSMISSION_TYPE::IDDCX_TRANSMISSION_TYPE_WIRED_OTHER;
-    diag.pEndPointFriendlyName = wstr!("punktfunk Virtual Display Adapter");
-    diag.pEndPointManufacturerName = wstr!("punktfunk");
+    diag.pEndPointFriendlyName = wstr!("Punktfunk Virtual Display Adapter");
+    diag.pEndPointManufacturerName = wstr!("Punktfunk");
     diag.pEndPointModelName = wstr!("Virtual Display");
     // SAFETY: `version` is a stack local that outlives this `init_adapter` call; IddCxAdapterInitAsync
     // (below) reads through these pointers SYNCHRONOUSLY, before `version` drops — the pointer never escapes.

packaging/windows/drivers/pf-vdisplay/src/edid.rs

@@ -6,7 +6,9 @@
 //! made "Use HDR" never appear for the virtual display). The base block declares EDID 1.4 + 10-bit
 //! digital so the panel's bit depth is unambiguous.
 //!
-//! Identity: manufacturer "PNK" (bytes 8-9), product name "punktfunk" (the 0xFC display descriptor). The
+//! Identity: manufacturer "PNK" (bytes 8-9), product name "Punktfunk" (the 0xFC display descriptor —
+//! this is what Windows shows as `Generic Monitor (Punktfunk)`; byte 127's checksum is recomputed in
+//! [`Edid::generate_with`], so editing the name here needs no hand-patched checksum). The
 //! serial-number field (base offset 0x0C, little-endian) encodes the per-monitor index so
 //! `parse_monitor_description` can map an EDID the OS hands back to its monitor; [`Edid::generate_with`]
 //! patches that serial and recomputes BOTH block checksums (base byte 127 + extension byte 255). The
@@ -34,7 +36,7 @@ const BASE: [u8; 128] = [
     0x45, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1E,
     0x00, 0x00, 0x00, 0xFD, 0x00, 0x17, 0xF0, 0x0F, // display range-limits descriptor
     0xFF, 0x0F, 0x00, 0x0A, 0x20, 0x20, 0x20, 0x20,
-    0x20, 0x20, 0x00, 0x00, 0x00, 0xFC, 0x00, 0x70, // name descriptor "punktfunk"
+    0x20, 0x20, 0x00, 0x00, 0x00, 0xFC, 0x00, 0x50, // name descriptor "Punktfunk"
     0x75, 0x6E, 0x6B, 0x74, 0x66, 0x75, 0x6E, 0x6B,
     0x0A, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0x00, // empty 4th descriptor...
     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,

packaging/windows/drivers/pf-xusb/pf_xusb.inx

@@ -58,7 +58,7 @@ UmdfLibraryVersion=$UMDFVERSION$
 ServiceBinary=%13%\pf_xusb.dll
 
 [Strings]
-ProviderString = "punktfunk"
+ProviderString = "Punktfunk"
 StdMfg         = "(Standard system devices)"
-DiskId1        = "punktfunk XUSB Installation Disk"
-DeviceDesc     = "punktfunk Virtual Xbox 360 (XUSB)"
+DiskId1        = "Punktfunk XUSB Installation Disk"
+DeviceDesc     = "Punktfunk Virtual Xbox 360 (XUSB)"

packaging/windows/punktfunk-host.iss

@@ -351,7 +351,7 @@ Filename: "{app}\punktfunk-host.exe"; Parameters: "driver uninstall --gamepad";
 ; Stop + remove the PunktfunkWeb task and its firewall rule (leaves %ProgramData%\punktfunk config,
 ; like the host uninstall does).
 Filename: "powershell.exe"; \
-  Parameters: "-NoProfile -ExecutionPolicy Bypass -Command ""Stop-ScheduledTask -TaskName PunktfunkWeb -ErrorAction SilentlyContinue; Get-NetTCPConnection -LocalPort 47992,3000 -State Listen -ErrorAction SilentlyContinue | ForEach-Object {{ Stop-Process -Id $_.OwningProcess -Force -ErrorAction SilentlyContinue }; Unregister-ScheduledTask -TaskName PunktfunkWeb -Confirm:$false -ErrorAction SilentlyContinue; Get-NetFirewallRule -DisplayName 'punktfunk web console (*' -ErrorAction SilentlyContinue | Remove-NetFirewallRule"""; \
+  Parameters: "-NoProfile -ExecutionPolicy Bypass -Command ""Stop-ScheduledTask -TaskName PunktfunkWeb -ErrorAction SilentlyContinue; Get-NetTCPConnection -LocalPort 47992,3000 -State Listen -ErrorAction SilentlyContinue | ForEach-Object {{ Stop-Process -Id $_.OwningProcess -Force -ErrorAction SilentlyContinue }; Unregister-ScheduledTask -TaskName PunktfunkWeb -Confirm:$false -ErrorAction SilentlyContinue; Get-NetFirewallRule -DisplayName 'Punktfunk web console (*' -ErrorAction SilentlyContinue | Remove-NetFirewallRule"""; \
   Flags: runhidden waituntilterminated; RunOnceId: "PunktfunkWebCleanup"
 #endif
 #ifdef WithScripting

packaging/windows/reset-pf-vdisplay.ps1

@@ -7,7 +7,7 @@
 .DESCRIPTION
   Sustained connect/disconnect churn (e.g. a client reconnect loop x the host's 8 pipeline-build
   retries - ~100 ADD/REMOVE cycles) exhausts the driver's IddCx monitor slots: the per-monitor
-  target_ids climb, ghost "Generic Monitor (punktfunk)" device nodes pile up, and eventually
+  target_ids climb, ghost "Generic Monitor (Punktfunk)" device nodes pile up, and eventually
   IOCTL_ADD returns 0x80070490 ERROR_NOT_FOUND ("Element nicht gefunden"). Every session then fails
   to create a virtual output -> the client gets a hard blackscreen. A host-service restart's
   IOCTL_CLEAR_ALL does NOT recover it; the driver instance itself must be reloaded.
@@ -16,16 +16,16 @@
     1. Stop the host service (it holds the driver's control device).
     2. pnputil /remove-device the GHOST (Status != OK = not-present) punktfunk virtual-monitor nodes
        that accumulated - the root of the slot exhaustion.
-    3. Disable + Enable the pf-vdisplay adapter (ROOT\DISPLAY\*, "punktfunk Virtual Display") to
+    3. Disable + Enable the pf-vdisplay adapter (ROOT\DISPLAY\*, "Punktfunk Virtual Display") to
        reload the IddCx driver instance and reset its monitor list. (Restart-PnpDevice does NOT exist
        on this box's PowerShell, so we disable+enable explicitly.)
     4. Restart the host service.
   Avoids a reboot on purpose (this box boots to Proxmox).
 
 .PARAMETER Service     Host service name. Default PunktfunkHost.
-.PARAMETER AdapterName FriendlyName substring of the IddCx adapter to cycle. Default "punktfunk
+.PARAMETER AdapterName FriendlyName substring of the IddCx adapter to cycle. Default "Punktfunk
                        Virtual Display" (NOT SudoVDA's "SudoMaker Virtual Display Adapter").
-.PARAMETER GhostMatch  FriendlyName substring of the virtual monitors to reap. Default "punktfunk".
+.PARAMETER GhostMatch  FriendlyName substring of the virtual monitors to reap. Default "Punktfunk".
 .PARAMETER KeepGhosts  Skip the ghost-node cleanup; only cycle the adapter.
 .PARAMETER NoHost      Don't stop/start the host service (just reset the driver) - used by
                        redeploy-pf-vdisplay.ps1, which manages the service itself.
@@ -41,8 +41,8 @@
 [CmdletBinding()]
 param(
     [string]$Service     = 'PunktfunkHost',
-    [string]$AdapterName = 'punktfunk Virtual Display',
-    [string]$GhostMatch  = 'punktfunk',
+    [string]$AdapterName = 'Punktfunk Virtual Display',
+    [string]$GhostMatch  = 'Punktfunk',
     [switch]$KeepGhosts,
     [switch]$NoHost,
     [switch]$Verify,