Guerdon's Posts

Guerdon's Posts

Yes, I realise that about the X1XTW - It was just another example of a Dell UltraSharp Color Calibration Solution (i.e. DUCCS).  Likewise, the 3rd link refers to a (different?) DUCCS for 2 other moni... See more...
Yes, I realise that about the X1XTW - It was just another example of a Dell UltraSharp Color Calibration Solution (i.e. DUCCS).  Likewise, the 3rd link refers to a (different?) DUCCS for 2 other monitors. You state "DUCCS was never validated with the U2711" so does that just mean it has never been tested or that it definitely won't work? You advise to "explore 3rd party monitor calibration options" but it's clear that some create an almighty mess and make things worse: - https://www.dell.com/community/Monitors/Color-Calibrating-U2711/m-p/3978472 Does Dell not have any suggestions or guidance in connection with such wide gamut monitors?
Calibrating & profiling wide gamut monitors can be more complicated than standard (sRGB) gamut monitors and will actually produce worse results via certain hardware & / or software (i.e. used for cal... See more...
Calibrating & profiling wide gamut monitors can be more complicated than standard (sRGB) gamut monitors and will actually produce worse results via certain hardware & / or software (i.e. used for calibration & profiling). I see that Dell has introduced DUCCS: - https://www.dell.com/support/home/au/en/audhs1/drivers/driversdetails?driverId=X1XTW - https://www.dell.com/community/Monitors/DUCCS-Downloads/td-p/4660194 - https://www.dell.com/support/article/au/en/audhs1/sln299127/dell-ultrasharp-color-calibration-softwa... However, there appears to be no references to the U2711. Does DUCCS work with the U2711? What is Dell's guidance on calibrating and profiling the U2711 in order to ensure color accuracy, which has inevitably slipped over time from its initial state?
Puszta - See en.community.dell.com/.../19921261.aspx
The article to which you refer is regarding power provided over the cable, which I assume you are stating is an issue over HDMI in the same way as it is over DisplayPort.  This is a related but diffe... See more...
The article to which you refer is regarding power provided over the cable, which I assume you are stating is an issue over HDMI in the same way as it is over DisplayPort.  This is a related but different question. The O.P. is purely about being able to obtain full (i.e. 2560 x 1440) resolution over an HDMI connection to a U2711. As mentioned above, this is possible via a custom resolution or by manually editing the EDID file (or preferably if Dell would create and issue something to update the EDID file to include 2560 x 1440 as a selectable option). To be honest, I'm a bit confused about your post.  You mention using a HDMI to DVI cable to run max resolution and then mention a sky box running 1080i. Firstly, I'd be very surprised to learn that you have a HDMI to Dual Link DVI cable (even if the cable looks like it has a Dual Link DVI connection) as apparently you need active electronics to convert the single link HDMI signal to a Dual Link DVI signal.  Otherwise, its is acting as a HDMI to Single Link DVI cable which I understand would not have sufficient bandwidth to carry the full 2560 x 1440 resolution.  However, if you're referring to 1920 x 1080 as being the full resolution due to Dell's stated native resolution over HDMI then this would make more sense. AFAIK, in terms of bandwidth requirement, 1080i is half of 1080p (i.e. Dell's stated native resolution of the U2711) which is in turn half of 1440p (i.e. 2560 x 1440 progressive scan). As for jd1977's comments on the article, s/he appears to simply be asking for a HDMI to DisplayPort cable recommendation, so I don't understand the relevance (and s/he's connecting to a U2311h not a U2711). Regardless, I suggest you create a separate thread for your problem; however, I concur that there appears to be unresolved issues with power saving / shut down / display driver crash & reboot etc with DisplayPort and HDMI connections to the U2711.
Toojays, you are correct regarding the stated maximum resolution, as mentioned in my post 18/6/11 3:12 above.  In other words, Dell has stated in its documentation that the maximum possible resolutio... See more...
Toojays, you are correct regarding the stated maximum resolution, as mentioned in my post 18/6/11 3:12 above.  In other words, Dell has stated in its documentation that the maximum possible resolution via HDMI is 1080p (i.e. 1920 x 1080) which is what has caused a lot of the confusion. You should be aware that HDMI and DP are simply methods of communication and as such, there is no reason why HDMI should be restricted to 1920 x 1080 when DP can be used to display 2560 x 1440.  Consequently, some people understood that Dell had somehow restricted the input of the HDMI port; however, Dell subsequently confirmed that the U2711's HDMI port is passive and does not restrict the input signal. You can be assured that IF your graphics card and driver can produce 2560 x 1440 via HDMI (and your cable can transmit such a signal over HDMI) that the U2711 will be able to display 2560 x 1440 at 60Hz and 32-bit colour via HDMI (i.e. as it can via DP). The easiest way to select this resolution may well be via the control panel for your graphics card where you create a custom resolution.  This did not always work for older drivers; however, the more up to date drivers are capable of creating and using this custom resolution.  I understand that some people have been able to edit the EDID file, which presumably is just to add 2560 x 1440 to the list of selectable resolutions; however, I can't really comment on that further. The following may prove useful reading if you require further information http://forums.whirlpool.net.au/forum-replies.cfm?t=1479962.  Much of the commentary on editing the EDID file is towards the end of that thread and there are other links there too. As for wanting to use HDMI instead of DP, I don't see the reason for this.  DP can provide the same functionality as HDMI (i.e. it can transmit audio) so perhaps your problem is with your audio settings.
Update - AFAIK and said above, DVI (Dual Link) and DisplayPort both work at full resolution (i.e. 2560x1440). However, iro HDMI, it is a little more complicated. The U2711 can display 2560 x 14... See more...
Update - AFAIK and said above, DVI (Dual Link) and DisplayPort both work at full resolution (i.e. 2560x1440). However, iro HDMI, it is a little more complicated. The U2711 can display 2560 x 1440 via HDMI IF your graphics card and driver (and cable) can handle it. You can create a custom resolution or edit the EDID file. In short, it appears that Dell regards HDMI to be for 'Video' only and as such, considers 1080p (i.e. 1920 x 1080) to be the maximum and thus 'native' resolution for HDMI. However, HDMI can carry sufficient bandwidth to display higher resolutions. So, if your video card and driver support it, you can force the monitor (via a custom resolution or by playing with the EDID file) to display the full 2560 x 1440 at 60 Hz and 32 bit. Note: I am not recommending any 'solution'. You should beware, as officially this is not supported, will probably come with warning from your graphics driver control panel etc. and can cause other complications too. Dell - Please create a flash update or something that updates the EDID file, so that 2560 x 1440 is seen as a standard, selectable, option via HDMI.  Alternatively, provide an explanation as to why this does not exist when it is the monitor's real native resolution.
Actually, that is not correct (iro U2711 & HDMI - I have no idea about the capability of a 3350 vostro). BTW, you should be able to get 2560 x 1440 if the 3350 vostro has a Dual Link DVI or Display... See more...
Actually, that is not correct (iro U2711 & HDMI - I have no idea about the capability of a 3350 vostro). BTW, you should be able to get 2560 x 1440 if the 3350 vostro has a Dual Link DVI or DisplayPort output.  But sticking with HDMI: The U2711 can display 2560 x 1440 via HDMI  IF your graphics card and driver (and cable) can handle it. You can create a custom resolution or edit the EDID file. In short, it appears that Dell regards HDMI to be for 'Video' only and as such, considers 1080p (i.e. 1920 x 1080) to be the maximum and thus 'native' resolution for HDMI. However, HDMI can carry sufficient bandwidth to display higher resolutions. So, if your video card and driver support it, you can force the monitor (via a custom resolution or by playing with the EDID file) to display the full 2560 x 1440 at 60 Hz and 32 bit. Note: I am not recommending any 'solution'. You should beware, as officially this is not supported, will probably come with warning from your graphics driver control panel etc. and can cause other complications too. Dell - Please create a flash update or something that updates the EDID file, so that 2560 x 1440 is seen as a standard, selectable, option.  Alternatively, provide an explanation as to why this does not exist when it is the monitor's real native resolution.
Chris, I contacted Dell technical support before I bought this monitor because although most (but not all) sales people thought that the full native 2560 x 1440 resolution could be displayed over H... See more...
Chris, I contacted Dell technical support before I bought this monitor because although most (but not all) sales people thought that the full native 2560 x 1440 resolution could be displayed over HDMI they were not 100% sure.  Dell technical support reassured me that there would be no problem at all – no caveats or anything! 07/07/2010 – “HDMI is a video mode and not a graphics mode”. 07/07/2010 – “The highest HDMI can go is . . . 1920 x 1080”. 17/06/2011 – “The monitor’s HDMI is passive”. 17/06/2011 – “The revision of HDMI does not matter”. 17/06/2011 – “It should do 2560 x 1440 for . . . HDMI”. i) HDMI maybe a ‘video mode’ but it is equally capable of transmitting and thus displaying graphics.  Basically, it is just a method of connection.  I appreciate that HDMI is often used for TV / Movies and currently the highest broadcast is 1080p; however, that does not make 1920 x 1080 the maximum possible resolution over HDMI.  Higher resolutions can be and are being captured and will inevitably become more popular in the future.  Furthermore, it appears that the maximum over HDMI is a bandwidth / MHz restriction which is a product of the resolution, refresh rate and color bit depth.  As such, the higher resolutions could potentially be supported by reducing the refresh rate and / or color bit depth to keep within the maximum bandwidth / MHz; as has happened with HDMI 1.4 which supports 4096 x 2160 at 24 Hz for 8, 10 and 12 bits per color channel. ii) I have encountered multiple people at Dell telling me that the U2711 both can and cannot support the full native 2560 x 1440 resolution over HDMI.  Perhaps everyone can get their story straight once and for all. iii) Can you 100% guarantee that the monitor’s HDMI port is passive?  Many appear to think that the monitor restricts the input to 1920 x 1080.  Similarly, the monitor’s documentation states “Set the screen resolution to 2560 x 1440 (DVI and DisplayPort) or 2048 x 1152 (VGA) or 1080p (HDMI, Component)”. iv) As SkyguyAFFI pointed out above, the revision of HDMI does matter.  HDMI 1.0 could not support the monitor’s full resolution or color depth, let alone both.  HDMI 1.3 and above can support up to 340 MHz (10.2 Gbit/s) and the U2711 only requires 241.5 MHz for 2560 x 1440 at 60 Hz & 10 bits per color channel.  However, all the links in the chain must support the desired resolution and color depth (i.e. video card, driver, output, cable, input and monitor).  For example, the cable must be High Speed (Category 2) as Standard (Category 1) cables certified under HDMI 1.3 have only been tested to 74.5 MHz and thus only support 720p and 1080i.  Furthermore, Deep Color support is an optional extra that may or may not be implemented in a specific product. I am a little confused regarding the advertised “12-bit internal processing” that “enables 1.07 billion colors”.  Surely only 10 bits per color channel are required for 1.07 billion colors (i.e. 2 ^ (10 bits x 3 color channels) = 1.07 billion colors).  Are the color numbers (i.e. 8 or 10 bits per channel, depending upon the output) color managed via 12-bit internal processing to produce more accurate colors?  If so, could the problem be with the system being fooled into thinking 12 bits per color channel are being used and thus limiting the resolution to 1920 x 1080 at 60Hz, which may be the maximum possible for a 36 bit color depth on HDMI 1.3? In summary, can you absolutely, 100%, confirm that the full native 2560 x 1440 resolution at 60 Hz and 30 & / or 24 bit color (i.e. 10 & / or 8 bits per color channel) is possible on the Dell U2711 over an HDMI to HDMI connection?  Theoretically it is definitely possible; however, have you actually seen it working correctly?
Sorry - I cannot help with the specific Dell laptops part.  It will depend on the graphics card (which you can look up) and the output options from each model. However, apparently, DVI (Dual Link) ... See more...
Sorry - I cannot help with the specific Dell laptops part.  It will depend on the graphics card (which you can look up) and the output options from each model. However, apparently, DVI (Dual Link) and DisplayPort both work at full resolution (i.e. 2560x1440). It would appear that HDMI should also work, as long as you have a "High Speed" / "Category 2" connection; however, I am having problems in getting this to work. At present, I appear to be limited to 1920x1080 over HDMI.  I can get more via VGA and understand that my graphics card is not the problem. Perhaps someone can help iro how to get 2560x1440 via HDMI out and answer your question iro which specific Dell laptops you could use.
Has anyone been able to display the full native resolution of 2560x1440 via an HDMI connection?
Before I bought this monitor, Dell technical advised that full 2560x1440 would be available over HDMI, which appears to be correct from what I've read about HDMI (as long as you have a High Speed / C... See more...
Before I bought this monitor, Dell technical advised that full 2560x1440 would be available over HDMI, which appears to be correct from what I've read about HDMI (as long as you have a High Speed / Category 2 connection). However, I appear to be limited to 1920x1080 (but can get more via VGA and know that the graphics card is not the problem). Has anyone been able to get 2560x1440 via HDMI?  If so, was this HDMI to HDMI or HDMI to Dual Link DVI?
Sorry - I cannot help with the specific Dell laptops part.  It will depend on the graphics card (which you can look up) and the output options from each model. However, apparently, DVI (Dual Link) ... See more...
Sorry - I cannot help with the specific Dell laptops part.  It will depend on the graphics card (which you can look up) and the output options from each model. However, apparently, DVI (Dual Link) and Display Port both work at full resolution (i.e. 2560x1440). It would appear that HDMI should also work, as long as you have a "High Speed" / "Category 2" connection; however, I am having problems in getting this to work. At present, I appear to be limited to 1920x1080 over HDMI.  I can get more via VGA and understand that my graphics card is not the problem. Perhaps someone can help iro how to get 2560x1440 via HDMI out and answer your question iro which specific Dell laptops you could use.