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adamjmac

y510p hdmi output not working at all with PB278Q monitor

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I have a y510p with a single 750m, so it is using the Intel graphics primarily. The Asus PB278Q monitor is correctly detected over HDMI, correctly recommends a resolution of 2560x1440, but when I enable the output in any mode (single, duplicate, or extend) at any resolution (even very low resolutions), the monitor displays only black. A signal is detected by the monitor, but it actually makes the monitor not able to open the menu or switch inputs until the HDMI cable is removed or the output disabled. As far as Windows is concerned everything is fine, as it thinks the display is working and asks to confirm the changes.

My colleague has a y500 with SLI 650m, and as I understand it the primary display is the actual 650m, and the same monitor works fine for him. I imagine if I was able to disable the Intel graphics completely, or stick a second 750m in the ultrabay (which I do not have), it would probably work.

I've tried on both Win7 and 8, and on both the drivers provided by Lenovo and updated drivers from Intel and nVidia.

Is there any way to force disable the integrated graphics? There are no relevant settings in the BIOS that I can find. Is there an unlocked bios that might provide such an option, or any other ideas of things I could try?

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Have you tried using a different HDMI cable? The thing is, cheap HDMI cables sometimes lack the bandwidth (maybe defective from factory) and you won't get a picture. Try using a different HDMI cable.

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Have you tried using a different HDMI cable? The thing is, cheap HDMI cables sometimes lack the bandwidth (maybe defective from factory) and you won't get a picture. Try using a different HDMI cable.

I tried three different cables that are quite thick and say "High Speed" on them with the same result. I suppose I will buy a really high quality one and try that to be sure.

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Any HDMI 1.3 compliant cable (or newer) should support that perfectly well. It's a digital signal, there's no need for gold contacts or super crazy shielding (unless you have a tesla coil running in your room, which I doubt :P)

I always by the cheapest digital cables and they all work flawlessly so far. I highly doubt your issue is the cable.

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An unlocked BIOS should be able to turn off integrated graphics (the y400/500 has a menu for this, although Intel gfx is disabled by hardware).

There should be a "preferred" setting in the Optimus menu, maybe that will enforce your 750m?

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An unlocked BIOS should be able to turn off integrated graphics (the y400/500 has a menu for this, although Intel gfx is disabled by hardware).

There should be a "preferred" setting in the Optimus menu, maybe that will enforce your 750m?

The nVidia control panel "preferred" option applies to individual programs, but overall Windows is still on the Intel. What unlocked BIOS would I try? I haven't seen much in the way of the y510p. The BIOS version as posted in the BIOS is 1.09.

Adam

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