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Screen class not working on ev3dev stretch
See original GitHub issueI am getting the following error with the recently released stretch package:
>>> import ev3dev.ev3 as ev3
>>> s = ev3.Screen()
>>> s.clear()
>>> s.update()
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/lib/python3/dist-packages/ev3dev/core.py", line 3320, in update
self.mmap[:] = self._img.tobytes("raw", "1;IR")
IndexError: mmap slice assignment is wrong size
It seems the same error prevents openrobertalab service from working:
$ journalctl -n 100
Oct 28 10:08:34 ev3dev openrobertalab[1992]: INFO:roberta:--- starting ---
Oct 28 10:08:34 ev3dev openrobertalab[1992]: INFO:roberta.lab:python path: /usr/bin:/usr/lib/python35.zip:/usr/lib/python3.5:/usr/lib/python3.5/plat-arm-linux-gnueabi:/usr/lib/python3.5/lib-
Oct 28 10:08:34 ev3dev openrobertalab[1992]: INFO:roberta.lab:status changed: disconnected
Oct 28 10:08:38 ev3dev openrobertalab[1992]: Traceback (most recent call last):
Oct 28 10:08:38 ev3dev openrobertalab[1992]: File "/usr/bin/openrobertalab", line 41, in <module>
Oct 28 10:08:38 ev3dev openrobertalab[1992]: main()
Oct 28 10:08:38 ev3dev openrobertalab[1992]: File "/usr/bin/openrobertalab", line 36, in main
Oct 28 10:08:38 ev3dev openrobertalab[1992]: service = Service('/org/openroberta/Lab1')
Oct 28 10:08:38 ev3dev openrobertalab[1992]: File "/usr/lib/python3/dist-packages/roberta/lab.py", line 88, in __init__
Oct 28 10:08:38 ev3dev openrobertalab[1992]: self.hal.clearDisplay()
Oct 28 10:08:38 ev3dev openrobertalab[1992]: File "/usr/lib/python3/dist-packages/roberta/ev3.py", line 179, in clearDisplay
Oct 28 10:08:38 ev3dev openrobertalab[1992]: self.lcd.update()
Oct 28 10:08:38 ev3dev openrobertalab[1992]: File "/usr/lib/python3/dist-packages/ev3dev/core.py", line 3320, in update
Oct 28 10:08:38 ev3dev openrobertalab[1992]: self.mmap[:] = self._img.tobytes("raw", "1;IR")
Oct 28 10:08:38 ev3dev openrobertalab[1992]: IndexError: mmap slice assignment is wrong size
Oct 28 10:08:38 ev3dev openrobertalab[1992]: INFO:roberta:--- done ---
This is on the latest snapshot (snapshot-ev3dev-stretch-ev3-generic-2017-10-24.img.xz). The stretch-compatible ev3dev version is there, since leds are working:
>>> import ev3dev.ev3 as ev3
>>> ev3.Leds.all_off()
Issue Analytics
- State:
- Created 6 years ago
- Comments:12 (12 by maintainers)
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Fixed by #424 (
develop, aka v2) and #425 (stretch-stable, aka v1). Also pushed the updated packages for the stretch-stable version.I believe that is because we had to do inversion.