DDC/CI writes are fire-and-forget at the protocol level: a successful send
does not mean the monitor honored the value. Many monitors (LG ultrawides
in particular) silently drop writes for VCP codes whose registers exist
but whose feature isn't really implemented in firmware.
- New _verify_after_set helper polls readback after every DDC/CI write and
reports {success: false} when the monitor didn't apply the value. Wired
into set_contrast, set_input_source, set_color_preset, set_picture_mode.
Input source uses a longer settle window since switching can briefly
disrupt the DDC/CI link.
- Picture mode (VCP 0xDC) now requires the capability string to declare
supported codes under cmds[0xDC]. Without that declaration we treat the
feature as unsupported even when reads succeed - the LG case where reads
return a stuck value and every write is silently ignored.
Backend (routes/display.py, services/display_service.py):
- Probe DDC/CI capabilities per monitor at enumeration time
- New endpoints POST /api/display/{contrast,input_source,color_preset,picture_mode}/{id}
- Picture mode goes through raw VCP 0xDC since monitorcontrol has no
high-level wrapper; labels follow MCCS spec with vendor-friendly fallbacks
- Each capability reports a *_supported flag so the UI can hide rows that
the hardware does not advertise
Frontend (links.js, app.js, styles.css, locales):
- Monitor cards grow a contrast slider (same editorial copper treatment
as brightness) and a "PICTURE TUNING" section beneath
- Picture tuning uses the IconSelect widget (matching the audio device
selector): per-port icons (HDMI, DisplayPort, DVI, VGA, USB-C),
thermometer for color temps, per-mode icons (movie reel, gamepad,
ball, etc.) for picture modes
- Humanizers turn SHOUT_CASE enum names into readable labels
(COLOR_TEMP_6500K -> "6500 K", HDMI1 -> "HDMI 1")
- 14 new i18n keys per locale (en/ru)
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
- Detect primary monitor via Windows EnumDisplayMonitors API and show badge
- Expand accent color picker with 9 presets and custom color input
- Auto-generate hover color for custom accent colors
- Re-render accent swatches on locale change for proper i18n
- Replace restart-server.bat with PowerShell restart-server.ps1
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
- New display service with DDC/CI brightness and power control via screen_brightness_control and monitorcontrol
- New /api/display/* endpoints (monitors, brightness, power)
- Display tab in WebUI with per-monitor brightness sliders and power toggle
- EDID resolution parsing to distinguish same-name monitors
- Throttled brightness slider (50ms) matching volume control pattern
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
alexei.dolgolyov