end of XP, Maxwell and such

Joined: 6 Dec 05
Posts: 3,066
Credit: 5,910,792,802
RAC: 3,249,580

RE: When you get to install


When you get to install the GTX750 and i assume connect the monitor to it instead, you'll probably find Boinc will no longer see the HD4400,
the solution is to extend the desktop onto the HD4400 (you can try a monitor or a dummy plug but some have said that is not always 100% reliable),

To extend the desktop, right click on the desktop, choose 'screen resolution', on the 'screen resolution'/'change the appearance of your display' screen hit the 'Detect' button,
now click on each of the not detected displays until you get to the HD4400, now set the 'multiple displays' selection to 'try and connect anyway on: VGA', click apply,
now on 'multiple displays' select 'extend these displays', then restart Boinc.


Until today I ran the system in question with my monitor plugged into the motherboard DVI connection--hence the HD4400 graphics were running my monitor. With the UEFI selections I had made, BOINC saw both my nvidia and Intel GPUs and was able to use them.

The precipitating event today was the arrival of a higher resolution monitor. 2560x1400 specifically. While just swapping connections got me a boot and apparent normal function, I found that I was not running at the full native resolution of my new monitor, and that Windows would not offer that resolution to me (even when I clicked something in advanced settings asking it to show me things that might not work.

I guessed that my HD4400 graphics (or driver, or ...) might be at issue, so tried plugging the new monitor in to my GTX750 card's DVI connection instead of the motherboard DVI connection (after first attending to changing my UEFI choice to make the PCIe graphics card primary). That got me boot, and while I was still in a less than full native resolution at first look now the full resolution was offered to me.

So, now back to this thread and the quoted material. I had never until today bothered with a dummy plug, extending my desktop, nor any other contortion to get BOINC to use both the HD4400 and the GTX750, but I no longer had active HD4400 tasks.

So I tried Claggy's "extend your desktop" trick and failed at the point where hitting the "detect" button got me no additional findings.

So, back to the UEFI, where I noticed a setting called iGPU Multi-monitor. This was set disabled, so on a guess I enabled it.

Next boot I tried the "detect" function as Claggy prescribes, and actually got something.

I did have some more oddities, including a full-up freeze with a loud sound entirely new to me, which I now believe was probably the fan on my GTX750 suddenly winding up to perhaps 100%.

Anyway, I've been running for a couple of hours now and things seem to be working.

To summarize lessons someone else might find useful:

1. If you are using the motherboard output to drive your monitor, you may find you don't need even to enable use of an add-on card in the UEFI to enable BOINC to use both on-CPU graphics and add-on card graphics.

2. While Intel is cagy about what resolution their on-CPU hardware can support (they say to ask your computer manufacturer for assistance if you can't get up to native resolution--which is not helpful, as I am my computer manufacturer) you may find more resolution to be supported in your add-on card than using the motherboard capability.

3. some alarming hitches may accompany first use of the "extend your desktop" method of enabling use of both Intel and add-on graphics.

Comment viewing options

Select your preferred way to display the comments and click "Save settings" to activate your changes.