I have monitor (DELL U2713HM) with WQHD resolution (2560×1440) and he support full resolution by DVI-D and DisplayPort and there is problem but in my laptop (MSI GE60) support this resolution only on HDMI port. I would to ask You: Can I convert HDMI on DVI-D or DisplayPort without losing WQHD resolution?
Convert WQHD from HDMI to DVI-D or DisplayPort
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Related Solutions
From what I heard, the cheap adapters don't work because you need something that generates an TDMS Signal. The cheap adapters expect the source to already support a TDMS Signal and more or less just convert mechanically.
I have a post here. I ended up buying a $100 Dell Adapter which works, but fails whenever power savings comes into play (I basically have to unplug/replug to "reset" the adapter).
In hindsight, I would have bought a Display Port Monitor or a second card, both options would have been cheaper and less problematic than the Adapter, but I already had 3 screens.
Edit: After 2 Weeks, I really regret it. The adapter just "crashes" after some time (black screen, sometimes it turns on, off, on, off... My Monitor always stays on, so it's the adapter not generating a picture signal anymore). I'll try a USB-Charger next as they hopefully have more power, but I now really regret not getting a DP Monitor instead.
Video of DisplayPort-DVI Adapter Suckage: http://vimeo.com/10425439
I'm writing this on a 2560x1600 Dual Link DVI monitor connected to a computer using HDMI 1.4.
Stop searching for HDMI to DVI-DL adapters. All adapters that you'll find are passive single-link adapters, even though they may be advertised as dual-link.
Although a HDMI 1.4 to Dual Link DVI adapter is possible to implement using an Analog Devices ADV7619
297 MHz HDMI 1.4 receiver that does automatically split high pixel clock links into odd and even pixels and two ADV7513
165 MHz HDMI 1.4 transmitters to transmit the pixels over two separate links, no manufacturer is making such a device.
You need a device that generates Dual Link DVI output from a single link input. And the only one that's widely available is a DisplayPort to Dual Link DVI adapter
, sold under several different brands.
With that, we've reduced the problem to converting HDMI 1.4 to DisplayPort 1.1. There were no solutions for this until recently, when the STMicroelectronics chip STDP2600
became available. Several brands sell adapters based on this chip. In case your monitor takes a DP input at full resolution, using only this adapter is enough - no need to convert to DVI-DL.
Connecting those two together should provide a HDMI 1.4 to Dual-Link-DVI solution. However, the Linux Radeon driver (xf86-video-ati) was still not happy with it, and ignored the 2560x1600 videomode in the list of valid modes in EDID. The reason was that the Linux Radeon driver would enable pixel clocks above 165 MHz only in case a monitor has a HDMI Vendor Specific Data Block in the Consumer Electronic Association extended block of EDID.
Obviously, a pure DVI monitor will not have a HDMI VSDB in CEA EB of EDID. I solved that by adding a S/PDIF audio de-embbedder for HDMI that I got off eBay into the chain that adds the CEA EB to add audio descriptors to EDID. A proper solution would be to provide a modified EDID file directly to the driver.
This works for Linux, on Windows you may not need the EDID change, or you may need a more extensive one. I don't have a Windows machine to test.
String all three together, make sure all are powered up via their USB connectors and voilĂ , beautiful full resolution 2560x1600 picture at 60 Hz refresh rate on my Dual Link DVI monitor.
Best Answer
HDMI and DVI-D are electrically compatible. The main exceptions for regular computer use are that HDMI supports audio (which DVI doesn't, and your laptop's output may or may not provide), and DVI allows for an analog link (which HDMI doesn't). Neither should be a significant issue in your case. It also appears that some graphics cards might not be able to drive all digital ports simultaneously and require an active converter, but that shouldn't be a problem either since it sounds like you are just looking to hook up a single external monitor to your laptop.
Going from HDMI to DVI-D (or the other way around) thus only requires a passive adapter cable or something similar. These are available at the few dollars/euros/pounds price point for a basic one, with prices going up if you want something fancy like gold-plated contacts.
Do however make sure that you get a converter that has "dual link" at the DVI-D side. Dual link is required to support higher resolutions over DVI; specifically, anything higher than 1920 x 1200 at 60 Hz. Dual link DVI-D allows up to 2560 x 1600 at a 60 Hz refresh rate, which meets your requirement of supporting 2560 x 1440.
I'm personally running (since a week ago) a Dell U2412M through the monitor's DVI-D input on the graphics card's HDMI output, with only a passive adapter cable. Works like a charm so far, with no discernable problems.