Jacob Nelson
5dbbb34096
Enables the MCT T6 USB Station (0711:5601) chip on the J5 Create JCD3198 dock, which drives the 4K30 HDMI port with no native Linux kernel driver. Stack: EVDI 1.14.16 (kernel module + libevdi) → t6evdi userspace daemon (mobilepixels-linux-driver, patched for EVDI 1.14 API) → MCT T6 over USB. Includes DKMS registration for evdi.ko (auto-rebuilds on kernel updates) and a Mutter D-Bus layout script that restores monitor positions by serial number after each daemon restart, working around the incrementing DVI-I-N connector name assigned by EVDI on every reconnect. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
86 lines
2.4 KiB
Python
Executable File
86 lines
2.4 KiB
Python
Executable File
#!/usr/bin/env python3
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"""Re-apply dual-monitor layout after t6evdi restarts.
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Matches monitors by serial number (not connector name), so it works
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regardless of what DRM connector name t6evdi assigns on each restart.
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LG FHD (GSM, serial 0x01010101) → left (x=0)
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Acer SA270 (ACR, serial 0x13102591) → right (x=1920), primary
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"""
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import sys
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import dbus
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BUS = 'org.gnome.Mutter.DisplayConfig'
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PATH = '/org/gnome/Mutter/DisplayConfig'
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LG_SERIAL = '0x01010101'
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ACER_SERIAL = '0x13102591'
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def find_mode(modes, width=1920, height=1080, rate=74.973):
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"""Return mode ID matching resolution+rate, falling back to resolution only."""
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for mode_id, mw, mh, mr, *_ in modes:
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if int(mw) == width and int(mh) == height and abs(float(mr) - rate) < 0.5:
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return str(mode_id)
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for mode_id, mw, mh, *_ in modes:
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if int(mw) == width and int(mh) == height:
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return str(mode_id)
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return None
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def main():
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try:
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bus = dbus.SessionBus()
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except dbus.exceptions.DBusException as e:
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print(f"ERROR: cannot connect to session bus: {e}", file=sys.stderr)
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sys.exit(1)
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proxy = bus.get_object(BUS, PATH)
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iface = dbus.Interface(proxy, BUS)
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serial, monitors, _, _ = iface.GetCurrentState()
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connectors = {}
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mode_ids = {}
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for (connector, vendor, product, mon_serial), modes, props in monitors:
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s = str(mon_serial)
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if s in (LG_SERIAL, ACER_SERIAL):
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connectors[s] = str(connector)
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mode_ids[s] = find_mode(modes)
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errors = []
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for label, key in [('LG FHD', LG_SERIAL), ('Acer SA270', ACER_SERIAL)]:
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if key not in connectors:
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errors.append(f"{label} not detected")
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elif mode_ids[key] is None:
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errors.append(f"no 1920x1080 mode on {label}")
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if errors:
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print(f"ERROR: {'; '.join(errors)}", file=sys.stderr)
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sys.exit(1)
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logical = [
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(0, 0, 1.0, 0, False,
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[(connectors[LG_SERIAL], mode_ids[LG_SERIAL], {})]),
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(1920, 0, 1.0, 0, True,
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[(connectors[ACER_SERIAL], mode_ids[ACER_SERIAL], {})]),
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]
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iface.ApplyMonitorsConfig(
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dbus.UInt32(serial),
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dbus.UInt32(2), # 2 = persistent
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logical,
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{},
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signature='uua(iiduba(ssa{sv}))a{sv}'
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)
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print(
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f"Applied: {connectors[LG_SERIAL]} (LG FHD) at x=0, "
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f"{connectors[ACER_SERIAL]} (Acer SA270) at x=1920 [primary]"
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)
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if __name__ == '__main__':
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main()
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