NO SIGNAL after ISO boot
- @david
I have tried two different .iso images Ubuntu and AlmaLinux on SuperMicro hardware for testing once the boot to .iso is initiated from server's boot menu and the option selected to Install Ubuntu/AlmaLinux the video goes to NO SIGNAL mode.
Here is log I see:
Jul 21 15:57:29 tinypilot python[1175]: 2023-07-21 15:57:29.117 hid.write ERROR Failed to write to HID interface: /dev/hidg0. Is USB cable connected?
Jul 21 15:57:29 tinypilot python[1176]: 2023-07-21 15:57:29.135 hid.write ERROR Failed to write to HID interface: /dev/hidg0. Is USB cable connected?
Jul 21 15:57:29 tinypilot python[1177]: 2023-07-21 15:57:29.332 hid.write ERROR Failed to write to HID interface: /dev/hidg0. Is USB cable connected?
Jul 21 15:57:29 tinypilot python[1178]: 2023-07-21 15:57:29.371 hid.write ERROR Failed to write to HID interface: /dev/hidg0. Is USB cable connected?
Jul 21 15:57:29 tinypilot python[1179]: 2023-07-21 15:57:29.499 hid.write ERROR Failed to write to HID interface: /dev/hidg0. Is USB cable connected?
Jul 21 15:57:29 tinypilot python[1180]: 2023-07-21 15:57:29.533 hid.write ERROR Failed to write to HID interface: /dev/hidg0. Is USB cable connected?
Jul 21 15:57:29 tinypilot python[1181]: Process ProcessWithResult-250:
Jul 21 15:57:29 tinypilot python[1181]: Traceback (most recent call last):
Jul 21 15:57:29 tinypilot python[1181]: File "/usr/lib/python3.9/multiprocessing/process.py", line 315, in _bootstrap
Jul 21 15:57:29 tinypilot python[1181]: self.run()
Jul 21 15:57:29 tinypilot python[1181]: File "/opt/tinypilot/app/hid/write.py", line 45, in run
Jul 21 15:57:29 tinypilot python[1181]: result.return_value = self._target(*self._args, **self._kwargs)
Jul 21 15:57:29 tinypilot python[1181]: File "/opt/tinypilot/app/hid/write.py", line 65, in _write_to_hid_interface_immediately
Jul 21 15:57:29 tinypilot python[1181]: hid_handle.write(bytearray(buffer))
Jul 21 15:57:29 tinypilot python[1181]: BrokenPipeError: [Errno 108] Cannot send after transport endpoint shutdown
David @david2023-07-24 11:16:52.184ZHi @dmiroshkin, I'm sorry that you're running into this No Signal issue after booting from ISO images.
Thanks for sharing that log snippet - unfortunately, the snippet doesn't provide enough information to determine the issue.
Are you able to share a full copy of the logs once you run into this issue? On your TinyPilot's web interface, navigate to System > Logs and click Get Shareable URL. Then share the URL in your reply.
Can you also tell me whether you're using a VGA adapter?
- DIn reply todmiroshkin⬆:Dmitry @dmiroshkin
@david I am using a VGA adapter that was supplied with the device
VGA to HDMI Adapter
$14.99
David @david2023-08-03 11:58:08.492ZThanks for confirming you're using the VGA adapter, @dmiroshkin.
And thanks for sharing those logs! It looks like the issue here is that Ubuntu / AlmaLinux are outputting at 1080p, 60Hz, which is unfortunately unsupported on TinyPilot.
The solution here is to try adjusting the output resolution on your target machine to a resolution and framerate that the VGA adapter can output to TinyPilot. I understand changing the display output might be difficult to do since the OS still needs installing at this stage.
An alternative solution is to modify your VGA adapter's EDID. It's a slightly involved process, but it prevents the VGA adapter from accepting resolutions from target machines that TinyPilot doesn't support. I wrote a small guide on how to do this in another comment on the forum.
Please let me know if that helps and if you have any other questions.