QXGA mod --- edid issues

[rhadamanthus]

I am in the process of hooking up a IAQX10S to my T60p with a compatible 42T0079 inverter running arch linux.

I am using the i2c-tools package (modprobe i2c-dev) to access and flash the EDID as described in this guide:

http://www.thinkwiki.org/wiki/Installin ... reparation

and

http://www.thinkpads.com/forum/viewtopi ... 3&start=90

I am currently hooked up to an external monitor and am attempting to determine which register I need to flash but I cannot get any data on any of the registers, despite the fact that the external is working.

When I issue the i2cdump -r 0-127 2 0x50 command it prints out an EDID matrix but instead of data there are only 'x's or 'f's.

I believe the external may be in register 3 or 4 because those are the two registers which give me f's instead of x's. I tested by running the i2c dump on a register then unplugging the vga cable and plugging it in again followed by another i2c dump on that register, rinse and repeat. Not sure if the f's were a result of this but it is when I noticed that they were in 3 and 4.

Also when I run the python program described in the guide I get Error: Write failed in registers 0-2.

[rhadamanthus]

Welp still have not figured out why i2cset is failing to write or why i2c-dump is failing to find a register with any data in it (such as the one that my external is plugged into).

I have figured out that there are 8 registers (0-7). i2c-dump on 0-2 and 5-7 results in an EDID matrix with x's instead of data while a dump on 3 and 4 results in an EDID matrix of all f's.

The i2cset command fails to write on 0-2 and 5-7 and I am afraid to use it on 3 or 4 because I think one of them could be my external monitor.

The only other angle that I can think of is adding -f to the i2c-dump (i2cdump -f -r 0-127 1 0x50). I am weary of doing this though as I read on the link below that you should not use -f if you don't know what you're doing.

http://manpages.ubuntu.com/manpages/one ... ump.8.html

Oh how this beautiful QXGA screen taunts me with a cold black face...

[RealBlackStuff]

See if this helps: http://forum.thinkpads.com/viewtopic.php?p=513541
Also, do a search on the forum with QXGA EDID for more info.
Very few people do/have done this, because the screens are too expensive, and the resolution is too high for most.

[rhadamanthus]

Thank you, there is a lot of information in there to review, I'll post updates if I find anything that works.

[rhadamanthus]

Great news, got the QXGA working and it is beautiful!!!

Ended up trying a neighbor's external monitor which for what ever reason came out on my i2c dump as being in register 1.

Ran the python code on register 3 and worked great!

[pianowizard]

Very few people do/have done this, because the screens are too expensive, and the resolution is too high for most.

Also, too heavy and too dim.