Dear devs,I'm trying to write the EEPROM in my ASUS 22T1E monitor containing EDID data using i2cset. The monitor is connected via HMDI to a Nvidia GeForce 1050 Ti. Actually I have no idea if there is a EEPROM in my monitor, I just assumed it. My problem is that the value never changes when I try to write.
# i2cset -r 4 0x50 38 0xd1
WARNING! This program can confuse your I2C bus, cause data loss and worse!
DANGEROUS! Writing to a serial EEPROM on a memory DIMM
may render your memory USELESS and make your system UNBOOTABLE!
I will write to device file /dev/i2c-4, chip address 0x50, data address
0x26, data 0xd1, mode byte.
Continue? [y/N] y
Warning - data mismatch - wrote 0xd1, read back 0x71
Also my GPU registers multiple buses, might it be related to that?
# i2cdetect -l
i2c-3 i2c NVIDIA i2c adapter 4 at 1:00.0 I2C adapter
i2c-1 smbus ddbridge SMBus adapter
i2c-4 i2c NVIDIA i2c adapter 6 at 1:00.0 I2C adapter
i2c-2 smbus ddbridge SMBus adapter
i2c-0 smbus ddbridge SMBus adapter
i2c-5 i2c NVIDIA i2c adapter 7 at 1:00.0 I2C adapter
Bus 4 seems to be the one containing the relevant data:
# i2cdetect 4
WARNING! This program can confuse your I2C bus, cause data loss and worse!
I will probe file /dev/i2c-4.
I will probe address range 0x03-0x77.
Continue? [Y/n]
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- 37 -- -- 3a -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: 50 -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --
Any ideas why this couldn't be working are welcome. Is it maybe not
possible to write the EDID data on this specific monitor? Should I try
this using a different GPU?
Regards,
Tim Schumacher
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