Hi,
Trying this on V2 firmware just doubles the amount of AMA applied, making it horrendous.
This 'trick' only works in V3 and newer. This was an undocumented "feature" added to V3. This applies to XL2420Z, XL2411Z and XL2720Z.
you will need to update the firmware.
Linux (Ubuntu) flash drive update instructions are here:
http://forums.blurbusters.com/viewtopic ... &start=200
All firmwares are still here at the moment, XL2430T has never been dumped though.
https://onedrive.live.com/?authkey=%21A ... D90690A202
If it disappears, there's a Russlan Benq FTP site with the firmwares available, I think the login is User/Password but I haven't been there recently. But the onedrive still works.
However more and more people have been corrupting their DVI EDID recently by flashing with Linux's flashrom, when this used to never happen back when the forums were much more active. No one knows why but I suspect it has something to do with UEFI equipped motherboard bioses that are blocking the EDID from being flashed. The Displayport connector has the EDID built into it as part of the DP spec, so that is unaffected. I can still flash with Linux and even BACKFLASH (if I want) without any problems on my Gigabyte P67 (Award bios) motherboard and my laptop (AMI?) Bios.
Even if your DVI EDID Gets corrupted, it's recoverable with the Mstar device.
The Mstar device has a 99% chance of succeeding (I can only recall one failure) but Benq incessantly insists on end users not trying to upgrade the firmware themselves, even though if you insist, and convince them you know what you're doing and you will accept voiding the warranty, they will still send you the firmware raw files.
It will cost you money though, unlike Linux.
cart100 changed names but the same device is still here:
http://www.yoycart.com/Product/52781882 ... ment_tool/
It's the exact same device Benq uses to upgrade monitors in their factory.
Software is on the main blur busters site under DIY V2 upgrade.
I own this device and it works perfectly.
Keep in mind if you DO try the Ubuntu method, the Displayport connection is NOT usable on the XL2420Z V2. it causes link errors and repeated disconnection/reconnect. This was fixed in V4 firmware. So if you DO try Linux, make sure you have another monitor available if the DVI EDID gets corrupted, you will NEED the Mstar device (there's another way to flash the DVI EDID through Linux by edid-rw, but I don't know if this will work on a Benq, as the EDID may be write protected directly and I don't know anyone who has the DVI EDID for a V2 XL*** monitor).