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Excellent. I noticed in the screenshots before that you'd set the screen to only 30Hz in nVidia Settings. The whole point of this exercise is to get you 4K@60Hz, and thus get rid of that awful flickering... so leave it set to either "Auto" or 60Hz in future. Anyway, xrandr showed it was a...

Ok we can remove the edid app again - served its purpose sudo apt-get remove read-edid

Ah splendid, so the problem is just convincing your AVR that it exists. Bear with me

Would've been nice to know that a couple of days ago; ) Ok, next: while still connected directly to your tv... Reinstall the edid app: sudo apt-get install read-edid sudo get-edid -q|parse-edid Paste output

That's great. Have sound too?

You'll need to be more specific wrt sounds - did that happen since changing driver, or before, or after?

Actually, while I think of it, could you connect an hdmi cable directly between the computer and TV (hdmi-1), then post the output of xrandr --verbose ?

No need. OK, leave this with me for an hour, I've gotta check something

OK, once rebooted, run xrandr and paste the output

Just peachy Now, we can update grub. I'll assume you've closed the terminal already, but even if you repeat the commands, nothing bad will happen: sudo su mount /boot update-grub Once you've done that, go ahead and install the most recent 430-series driver you have available, then reboot.

OK, we'll do it this way, first. 1) Download the attached file and save to your computer - I'm going to assume it downloads to /home/Daniel/Downloads, but I trust you'll be able to find it once it downloads. 2) Do this: sudo su cp /etc/default/grub /etc/default/grub.backup cp...

Next thing: cat /etc/default/grub

That would probably give you best performance. Let me know how you get on.

Could you also type the following and paste the output. I think it's probably safer if I edit files and just get you to copy/paste them: cat /etc/default/grub We'll do a little more tomorrow. It's late here for me again...

Got it. So the rear panel of your Denon looks like this: http://manuals.denon.com/AVRS500BT/NA/EN/WBSPSYjsdhemcn.php Right, so your connections will be: Computer to Denon AVR, HDMI 5 GAME Denon AVR, HDMI OUT to TV HDMI-1 (because HDMI-2 is broken and so we'll pretend it doesn't exist) Your...

That's OK, it's a known starting point. So far all I've been doing is gathering information and making sure I know what will happen next, and trying to anticipate what could go wrong ;) This ain't our first rodeo :p So you're back on the 340 drivers? Can you type the following command and...

D~, while I've always loved your enthusiasm, you really need to control the urge to experiment here. Everything we've done so far has been for me to build up a picture of how your setup is laid out. If you now go changing cables around, then it's just time wasted. Please put all your cabling...

That's unfortunate, but HDMI-1 is also OK. It's HDMI-3 and HDMI-4 that are the runts of this particular litter. No, the reason why you're limited to 1920x1080 for the next little while is because of two things: - kernel modesetting - change in EDID handling Let's sort out the modesetting...

I'm turning in again shortly, as it's close to 10pm here, and I'm up again at 5am. Just by way of background, when running through an A/V receiver, display setup takes a little longer, as an agreeable resolution and scan rate has to be set by all three devices in the chain. In essence, the...

I could open the file - it was just a matter of downloading it and tar -xzf Xorg.0.log.tar.gz, and there's your log file all ready for me to review :) Nothing too exciting in it - I just needed a benchmark to see what your system normally says: every system has its own collection of messages...