#StandWithUkraine
Andrey “Rarst” Savchenko —  — Hardware — asus, display, monitor

Asus 27T1E TV monitor (and overscan issues from hell)

I kinda resolved this summer to break away from cycle of disaster-driven upgrades. More or less done with Mini-ITX system and another component clearly in need of replacement was my old 19” Acer display.

I was eyeing several large monitors and one I was able to catch available and purchase was Asus 27T1E – 27” display and TV combo.

What was I looking for

I am not doing anything color-related so needed something consumer grade in that department. As for other wants:

  • large physical size, but not necessarily high resolution (gets really expensive fast and with my poor eyesight I actually like lower DPI);
  • internal speakers (in spirit of reducing clutter);
  • HDMI for video and audio (in spirit of reducing clutter).

“TV monitor”?

Asus site lists this one both as part of regular widescreen displays and part of TV monitor series. Using LCD TVs as affordable large screen computer displays is hardly new idea, Asus just makes it kinda official offer here.

asus_27t1e

asus_27t1e

Essentially TV monitor series are TV units (with analog+digital tuner) that are marketed for use as computer displays. Result is somewhat tricky.

Model has extensive set of inputs, but strange one for a PC display:

  • TV signal;
  • VGA (D-Sub);
  • 2x HDMI;
  • 2x SCART;
  • composite;
  • S-Video.

Note that there is no DVI or DisplayPort.

Since I was going to use HDMI anyway I didn’t brood much over DVI.

HD, HDMI, EDID and overscan… equals WTF

Researching before purchase I came up on several mentions that there are issues with native resolution of 1920x1080 when using HDMI. I thought it’s probably nothing I can’t solve… And I stayed solving that till 3AM yesterday.

It turned out Asus was being lazy with their product, NVIDIA was being lazy with their drivers and then they met at my desk.

When connected through HDMI native resolution was horribly distorted and larger than screen. Turns out that stuff is called overscan.

  1. display identifies itself as TV-like (which it is);
  2. NVIDIA driver thinks that it is generic TV and formats signal for one;
  3. display doesn’t expect that;
  4. oops!

So to simply fix overscan you either need to:

  • explain video card drivers that it is not a generic TV on other end and it needs to serve PC signal… which you can’t do with NVIDIA drivers;
  • explain to display that it needs to treat input signal as one from dumb computer… which Asus didn’t bother to implement.

Screwed or what?

Many Internet pages and arcane tutorials later I had decent understanding of issue and possible fix. Display reports extended display identification data (EDID) with some extras that confuse video driver. So if we override extra part then driver stops over thinking situation and simply serves straight HD.

There are several methods, this thread on NVIDIA forums is most extensive I found on topic. For me following registry fix worked:

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Video\{21BC8C2D-6BFE-4DA3-8302-996777ECE4EC}\0000]
"OverrideEdidFlags0"=hex:04,69,f4,27,00,00,ff,ff,04,00,00,00,7e,01,00

Windows display id (after \Video\) is unique to OS installation and first four bytes of hex stuff (04,69,f4,27) are hardware id for specific display, unique to 27T1E model.

This fixed resolution for me… But display went mute.

  1. fix had disabled part of extended information about display;
  2. among other things that parts contains information that display is audio-capable;
  3. video card drivers see no point in transmitting sound to incapable device over HDMI;
  4. good that display has regular analog 3.5mm audio input;
  5. bad that display ignores that input when connected by HDMI and Asus didn’t bother to implement option to control this behavior.

So video card driver refuses to send digital audio and display refuses to listen to analog audio.

Screwed twice.

I went through manual and according to it for HDMI transmitted without audio you are supposed to use separate RCA audio input instead of 3.5mm one. Luckily my (now deprecated) speakers had such cable, which I promptly looted and got both video and sound working properly at the same time.

First impressions

Aside from some hours of dealing with crazy overscan issues display is actually very nice.

27” screen size is very spacious. Excellent for browsing and coding, gorgeous for video.

2x 7W speakers are decent (not worse than generic speakers I had for like ten years) and deliver more volume than usual for integrated in display. Volume controls are conveniently on top of display and there is headphones output on the right side (sadly no microphone one).

For calibration I tweaked colors in NVIDIA control panel wizard. Was also going to adjust contrast and brightness but came upon ASUS Smart Contrast Ratio (ASCR) in display menu that controls those automagically by analyzing current input in real time. Trialing it on, so far so good.

Don’t really need TV part, I’d actually prefer TV-less MT276H model, but it doesn’t seem to be sold around here.

Overall

Asus did absolutely horrible job of adapting LCD TV to the role of PC display. Many generic LCD TVs are actually better adapted to be used in that way, even without being marketed for it.

Aside from that what you get is large full HD display (with TV tuner on top) with good image quality for moderate price.

Link http://www.asus.com/product.aspx?P_ID=3PJNaUQVQHWCPPAt

Related Posts

36 Comments

  • Rush #

    I gave up on any kind of monitors and just use hdtv's instead a couple years ago. I use 4 on this system. My mobo has 4 pcie slots and at one point, I considered using all 4 because I can make people sick with my display's. Hyperspace, or Lattice (rssavers) usually does the trick. I love it, although reading webpages at 1920x1080 can be a little trying.

  • Rarst #

    @Rush I use 4 on this system Ehm, you use four HDTV panels at the same time?? That is sick setup indeed. :)

  • Rush #

    yeah, 37" Dynex's (Cheap 1080i Best Buy brand). It's overkill but every time I've tried to scale back, I feel like something's missing, and the few times I tried invoking the third card, I thought my girl would leave me. So 4 seems to be my limit. Can't keep an active screen saver because she says it makes her dizzy, so I use DarkScreen at night.

  • Rarst #

    @Rush Heh, I was on dual-screen setup for some time. But despite it being the ultimate techie thingie I found it inconvenient. For me it is faster to switch between windows on single monitor than drag my attention from one to another. Easier to keep attention focused as well.

  • udemi #

    Hi, I purchased exactly the same screen today, Asus 27T1E. I have a question. Before this I used a 24 inch Samsung. I connect my pc with hdmi and I have a ATI 5850HD card. With the drivers of last year october!! I had perfect view on the Samsung. In july this year I updated the drivers of the card. After that I had the same sizing problems as you had. After a looong search and tries of different versions of drivers, I ended up restoring the system back to a day before and that solved then the problem of oversizing. Anyway, I bought this screen because I wanted a bigger screen. I saw it in discount somewhere. After connection with hdmi and updating my drivers of the ATI card, I had no significantly problems with the sizing. Only one question: does your screen also seem a little bit blurry/bad when it comes to read text and websites?? In comparison with my Samsung, which had crystal sharp image, I find this screen complete disaster in that way! I tried severals settings but can't seem to get the same sharpness. It doesn't seem normal to me that bad text.

  • Rarst #

    @udemi Text should be perfectly clear and normal, like on any regular TFT screen. If text is blurry likely it means you still have issue with image not being perfectly aligned with screen - pixel for pixel. This was typical situation in times of CRT monitors (they could work with multiple resolutions just fine) but for TFT this ends up being catastrophic loss of image quality. Unfortunately I had my portion of troubleshooting on integrated nvidia card, so I have no idea if and how many of my experience applies to your case with ati card.

  • Gerard #

    Hi Rarst, I'm considering to get this monitor and I'm aware about its EDID problem. Although the issue can be solved with the Registry hack in case of a PC with a NVIDIA card, I'm not so sure about possible problems with other HDMI peripherals. Like XBOX360 or other HDMI sources. Because in that case you can't 'hack' your XBOX to make it emit the correct signal as you would do on your PC. I've tried to Google for possible HDMI probs, to no avail. Have you tried to plug other peripherals other than a PC to this monitor's HDMI port? Did that work OK? I'm especially interested about XBOX. Thanks for your article, I nearly bought the damn thing, when stumbled on your site :)

  • Rarst #

    @Gerard The issue in post is from precise combination of dumb decisions from Asus and nvidia both. I have no idea how would it behave with another input. I do not own XBOX and my only other HDMI source is notebook that also has nvidia video card (so same drivers and same issue). My rough guess is that it should work fine without PC drivers overthinking and messing up signal type. But to be really sure your best option is to drag your XBOX to store that will allow to unpack and test before purchase. By the way since I bought this one several 27" analogues from Samsung and LG appeared on the market. Google around, they might have done better job at adapting TV to monitor.

  • p1ague #

    I also decided to replace my LCD monitor with a generic (Sabre, I think) cheap 1080p HDTV and found that connecting the HDMI output of my RadeonHD5850 directly to its HDMI input produced similar horrible overscan problems. Instead of messing with drivers or registry, though, I tried a cable I had laying around from back when our cable box had only one unconventional HD capable output: a DVI-to HDMI cable. With the DVI output going to the HDMI input of the TV, it displays pixel-perfect 1920x1080. I wouldn't know for sure, but since it sounds like similar conversion trouble, I would bet that one of these cables will fix any other TV/monitor for which a DVI output is available (re: ATI issue above) I did use the old monitor as a 2nd, but laying it sideways (and rotated 90 degrees in the driver) so that the old monitor is better for reading (..long threads like this one..) and the new one is better for most everything else. That dual purposing has defeated the otherwise inconvenient issue that my attention is likewise absorbed by one display or the other.

  • Rarst #

    @p1ague Something I discovered later with another monitor - ATI drivers have the perfect option to control overscan. A little hard to find, but at least they have it at unlike nvidia crap.

  • p1ague #

    I don't think I tried those, but similar functions on my laptop's nvidia HDMI output (don't think they were part of the NVIDIA drivers, just Win7 display calibration tools or something, or possibly proprietary to the ASUS laptop's HDMI port even) to my big screen HDTV basically just reduce the resolution (significantly; I think it's something like 1866x989 or something crazy, because without fixing it, standard 1920x1080 has very large bands on every side that aren't visible--you can't see the title bar, menu bar, address bar OR tabs in a maximized firefox window), which I'd hate to do when there's a possibility of displaying native correctly (even if it's an inexplicably odd workaround.. when its HDMI out thinks it's putting out 1920x1080 progressive to a digital display, I don't really understand how the TV can screw that signal up, but it does)

  • Rarst #

    @p1ague I had chance to try that setting myself with large LED monitor, connected via HDMI and I can say it completely fixed overscan issue. Perfect pixel-to-pixel picture. That crap of messing with resolution on other hand is ugly for either nvidia or ati, it just ruins image.

  • dk2000 #

    I am still fighting with the asus 24T1E and a HP DV6 Notebook (i5 2410 with Intel IGP + ATI 6770). Can't get it right - can anyone help?

  • Rarst #

    @dk2000 ATI drivers should have much better controls for overscan/underscan (unlike nvidia that refuses to implement them). I think posts on this I know mostly show for older driver interface, so just poke around - should be somewhere in settings for specific monitor or around that.

  • Kathilein #

    Hey, thanks for this great tutorial, I got it working well...except sound. Cause for me, chinch does not work. In general, nothing works concerning sound. Not in vga mode, not in hdmi mode, neither chinch nor 3,5mm. Sound is working well with TV though. Any idea for a solution? Thanks man! Kathi

  • Rarst #

    @Kathilein As per post with this tweak you need to use red/white RCA connectors for audio, not 3.5mm. If you look at the back connectors are grouped together with lines. RCA (which you need) is grouped with HDMI, 3.5mm (won't work while using HDMI) grouped with VGA.

  • Kathilein #

    Hey, thanks for the fast reply. Yeah, I tried those as well. Actually having the same for my hifi-speakers so I could use them as you did. Just that on the monitor, they don't work.. By now I figured how to make it work with vga cable though, was not so complicated finally. Now I gotta fine resolution and sound via 3.5. Does it have something to do with me using dvi to hdmi cable? Will the RCA only work when using an hdmi to hdmi cable. I do btw have an nvidia gts250, new drivers for audio / video (from october 2011) are installed. Oh man :(

  • Rarst #

    @Kathilein It might have to do with cable. This stuff is so "smart" it becomes stupid. Trying to only send signals that are supposedly needed and supported only creates such issues. :(

  • Marco #

    Hi there, I came to this page because of overscanning problems with an ASUS 22T1E. I tried many solutions, the EDID overwriting worked for me, but I could'nt get the audio, even with RCA cables (linked near the two HDMI ports). I just wanted to inform you that on Ubuntu 11.10 (and also on previous versions) with the generic driver, the monitor worked at 1920x1080 witout overscanning problems. It was like a dream. But, heh, it had no audio (I'm using audio through HDMI), so I installed the Nvidia drivers. Yes, audio was working fine the next reboot, but there was als the overscanning. FFUUUUUUUU! P.S: Could you please post an image of where you linked the RCA cables?

  • Rarst #

    @Marco RCA jacks near HDMI should work, at least they did for me... I've recently changed computer and couldn't make HDMI work with new one at all (Core i7 integrated video). :( So now I am stuck on VGA. I've seen mentions that there is firmware update that improves HDMI stuff, but I wasn't able to get my hands on it via Asus support or otherwise. :( I am so tired of this crap I would probably just look into buying new display this year.

  • Marco #

    @Rarst Thank you for the answer. The RCA cables seem to sream audio working only while the PC is booting (I was tryin' to play music from my phone, and for these seconds I was hearing the music). That could sound quite normal, as I'm playing audio trough HDMi normally, but how can I disable the HDMI audio? In the Nvidia Control Panel there's an option, but when I disable the audio, the RCA port doesn't work. I managed to port audio in HDMI with a jumper on my graphic card (Nvidia 9800 GT, Palit manufacturer), linked to the SPDIF audio port of my PC. Hoping for the best.

  • Rarst #

    @Marco I've seen suggestions to disable HDMI audio by disabling driver in Device Manager, but it doesn't seem to be very reliable/convenient method.

  • Rich #

    Hello Rarst, thank you for this tutorial and sharing thoughts. I too think Asus did absolutely horrible job of adapting their LCD TV to the role of PC display. Now that AMD fixed it I have no problem with hdmi scaling with my Radeon 5870 and ASUS 27T1E. But yet I'm very, very very much dissatisfied with its rather insufficient level of black color which makes this monitor colors and contrast rather vague as compared to those in majority of PC optimized monitors. Do you, or perhaps anyone else feel this, or is it just me? Any workaround?

  • Rich #

    ATI/AMD Catalyst Control Center > My Digital Panels > Scaling Options: http://assets.overclock.net.s3.amazonaws.com/f/f2/f26eabcb_vbattach220513.jpeg

  • Rarst #

    @Rich I hadn't much luck fiddling with display controls and mostly applied some adjustments in display driver (don't remember specifics, I think I moved gamma and brightness a bit). I had moved to new display setup this summer (2x 27" NEC displays, need to write up about it) and at last degraded Asus to kitchen TV role where it belongs. :)

  • Rich #

    Well, I guess kitchen is where it fits then. I'm never gonna buy again a TV screen for PC role. An occasional PC role such as notebook connect - yes, on a regular basis for desktop - never. Vague colors. It's a TV, not a monitor really. Good luck to you with those 27"Nec's. And thank you for your replies.

  • Rarst #

    @Rich To be fair TVs (even genuine, not marketed as computer displays) from other manufacturers (like Samsung) have much better adaptation to work with computers. On other hand nowadays there is no shortage of 27" displays and they seem to be moving towards high resolution IPS at better price. So not much reason to buy TV for computer display... Until you want 32" and up. :)

  • Rich #

    I too have heard Samsung's are better than ASUS for higher (or just better) contrast and richer colors. By the way, Rarst, 27T1E remote control > Picture has these adjustments, Sharpness Color Tint (?) it appears greyed out all the time, what's it for? Brightness Contrast What's Tint for? How can you move the slider?

  • Rarst #

    @Rich No idea, as above - I mostly adjusted computer-side. I think available tweaks on display depend on how it is connected (VGA / HDMI).

  • Rich #

    Arr...right, obvious, it's unavailable over HDMI. Adjusting computer-side (via AMD Catalyst) for gamma helps a little, but still doesn't look as right as in my previous 19"Viewsonic 1280x1024 (D-Sub). I'll try asus support, wonder if they can write a driver for us. (Btw, their support form shows 27T1E under "LCD monitor", not "TV". Therefore, my verdict is, like any monitor 27T1E needs a good driver.)

  • Rarst #

    @Rich Unfortunately there is nothing resembling proper driver for this display. For what Asus calls driver they provide several INF files with color profile, which improves picture somewhat but by no means drastically.

  • Rich #

    @Rarst, Interesting, "For what Asus calls driver they provide several INF files with color profile..." being what, where do you get those files? As far as I can reach on asus support, there's only 26 manuals and that's it. Link plz. http://support.asus.com/download.aspx?SLanguage=en&p=13&s=22&m=27T1E&os=&hashedid=3PJNaUQVQHWCPPAt -------------------------------------------------- I've submitted my technical inquiry form and will talk to them more if they reply. They should write a driver that would turn this spacious display with high contrast and brightness capacity into a true monitor, fixing scaling and picture. If they come up with a USB-flash fix, they should add gamma control to the remote picture adjustments list.

  • Rarst #

    @Rich Can't find it now, so probably they don't even provide that anymore.

  • Rich #

    No luck writing to the support, they didn't even answer my request ticket and only marked it 'Close'. ----------------------------------- My ASUS 27T1E new settings (Radeon over HDMI on Belkin cable): Sharpness 80 Color 70 Brightness 60 Contrast 50 Color temperatures: Red 53 Green 53 Blue 53 Built-in speakers equalizer: 120 Hz 15 500 Hz 10 1.5 kHz 15 5 kHz 25 10 kHz 50

  • Ruben #

    @Rich Hi man, i have a 24T1E TV/Monitor and i have the same overscan problems. The fact is if i set 0% of overscanning in Catalyst the pic goes off of the corners. Any Suggestions?

  • Rich #

    @Ruben, HDMI scaling is often unavailable at resolutions other than the monitor's native. You may want to report your issue to AMD. Try scaling HDMI when your desktop is set to the maximum resolution supported by your monitor, and try other resolutions as well. Make sure the refresh rate is set as recommended for your monitor, usually automatically. And finally be sure you are using 4:4:4 full RGB pixel format.