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Restore display orientation after Windows resume #1069

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Restore display orientation after Windows resume #1069

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6b6536c
Restore display orientation after Windows resume
MrSoichi Aug 26, 2026
d2a8805
Remove resume-specific orientation log
MrSoichi Aug 28, 2026
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8 changes: 4 additions & 4 deletions library/display.py
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Original file line number Diff line number Diff line change
Expand Up @@ -126,12 +126,9 @@ def initialize_display(self):
# Send initialization commands
self.lcd.InitializeComm()

# Turn on display, set brightness and LEDs for supported HW
# Turn on display, set brightness, LEDs and orientation for supported HW
self.turn_on()

# Set orientation
self.lcd.SetOrientation(_get_theme_orientation())

def turn_on(self):
# Turn screen on in case it was turned off previously
self.lcd.ScreenOn()
Expand All @@ -142,6 +139,9 @@ def turn_on(self):
# Set backplate RGB LED color (for supported HW only)
self.lcd.SetBackplateLedColor(config.THEME_DATA['display'].get("DISPLAY_RGB_LED", (255, 255, 255)))

orientation = _get_theme_orientation()
self.lcd.SetOrientation(orientation)

def turn_off(self):
# Turn screen off
self.lcd.ScreenOff()
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4 changes: 3 additions & 1 deletion library/lcd/lcd_comm_rev_a.py
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Expand Up @@ -173,7 +173,9 @@ def SetOrientation(self, orientation: Orientation = Orientation.PORTRAIT):
byteBuffer[8] = (width & 255)
byteBuffer[9] = (height >> 8)
byteBuffer[10] = (height & 255)
self.serial_write(bytes(byteBuffer))
# Serialize orientation with the other display commands. A direct write can race
# the queue worker when Windows resumes and scheduled sensor redraws start again.
self.SendLine(bytes(byteBuffer))

def DisplayPILImage(
self,
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7 changes: 7 additions & 0 deletions main.py
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Expand Up @@ -161,10 +161,17 @@ def on_win32_wm_event(hWnd, msg, wParam, lParam):
display.turn_off()
elif wParam == win32con.PBT_APMRESUMEAUTOMATIC:
logger.info("Computer is resuming from sleep, display will turn on")
# Windows may resume the process before the USB/serial endpoint is fully
# ready. Also allow queued pre-suspend writes to finish before restoring
# display state and redrawing the theme.
logger.info("Waiting 1.0s for USB display to settle after resume")
time.sleep(1.0)
wait_for_empty_queue(2)
display.turn_on()
# Some models have troubles displaying back the previous bitmap after being turned off/on
display.display_static_images()
display.display_static_text()
logger.info("Resume redraw queued")
else:
# For any other events, the program will stop
logger.info("Program will now exit")
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