'Raspberry Pi 4 I2C bus was working, but fails after reboot

I have an SSD1306 OLED display and RPi4. I used the tutorial from https://maker.pro/raspberry-pi/projects/raspberry-pi-monitoring-system-via-oled-display-module which (after a small mod) was working up until I updated /etc/rc.local and did a reboot. Since then, I get nothing.

sudo i2cdetect -y 1 now gives me:

     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:          -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --

I had created an image of the SD Card before setting up the OLED, and restoring the image and trying again I still can't detect the OLED.

I'd appreciate any tips or thoughts on resolving this.

raspberry-pii2c


Solution 1:[1]

Solution is unknown. I left the Pi run for a while, then tried again and it just worked.

Sources

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Source: Stack Overflow

Solution Source
Solution 1 Shanef

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