Two changes were required for GRUB bootloader
Adding 15 second boot menu delay to grub config solves thunderbolt boot failure.
Delay is added to /etc/default/grub
$ cat /etc/default/grub
...
Jaakko Korhonen korjaa
korjaa
/ egpu_razer_core_x.md
Last active
July 22, 2022 19:28
Notes for Ubuntu 20.04 external GPU setup
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| import logging | |
| import cv2 | |
| def main(): | |
| cap = cv2.VideoCapture("uhU.webm") | |
| cap.set(cv2.CAP_PROP_POS_MSEC, 1000.0) | |
| #cap.set(cv2.CAP_PROP_POS_FRAMES, 1000.0) | |
| w, h = cap.get(cv2.CAP_PROP_FRAME_WIDTH), cap.get(cv2.CAP_PROP_FRAME_HEIGHT) |
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| def average_dbm(dbms): | |
| # https://en.wikipedia.org/wiki/Decibel | |
| # https://en.wikipedia.org/wiki/LogSumExp | |
| # Less numerically stable version: | |
| # 10*numpy.log10(numpy.mean(numpy.power(10, (dbms-30)/10))) | |
| bel_np = 0.5 * numpy.log(10) # Bel & Neper by definition | |
| dbel_np = bel_np / 10 | |
| np_to_db = 1 / dbel_np |
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