Custom Resolution Utility (CRU)

[ToastyX]

(08-23-2020 05:50 PM)matthew Wrote:  No I'm not sure what it was before the screen was replaced but its definitely more zoomed in, so 1366x768 is too low but I can't work out what the original was.

In the Windows display settings, is the scale set to 100%?

[matthew]

(08-23-2020 05:56 PM)ToastyX Wrote:  

(08-23-2020 05:50 PM)matthew Wrote:  No I'm not sure what it was before the screen was replaced but its definitely more zoomed in, so 1366x768 is too low but I can't work out what the original was.

In the Windows display settings, is the scale set to 100%?

Yes on 100% and it won't let me go below that unfortunately

[vigan1]

Hello everyone.
Can you help me set my Surface display to 3000*2000px 50Hz.

I need to have perfect timings, what should I enter in the setting in CRU, and polarity ?
I don't know what to calculate.

By default when I install a fresh windows, it default to 52Hz, do you know why ?
When I bought it was 60hz.

Thank you.

EDIT : I can't change resultion inside the Intel Graphic Control Panel I have this error :
"The custom resolution exceeds maximum bandwidth capacity."
And when I use CRU 1.4.2 I add the resolution 3000*2000*50hz and 3000*2000*25hz, but they do not appear in the Monitor settings, or the intel panel after restart.
I already used CRU befor but I never had this issue on my other computers.
Can you help me. On ubuntu it's a solid 3000*2000*60HZ.

When I click on "list all modes", all the resolution are locked to 52HZ !
And the CRU resolution are not registered.

EDIT : Could it be EDID related ? Because when I don't use any graphic drivers I am not locked to 52HZ ?

[ToastyX]

(08-24-2020 12:38 PM)vigan1 Wrote:  Hello everyone.
Can you help me set my Surface display to 3000*2000px 50Hz.

I need to have perfect timings, what should I enter in the setting in CRU, and polarity ?
I don't know what to calculate.

By default when I install a fresh windows, it default to 52Hz, do you know why ?
When I bought it was 60hz.

Thank you.

What do you mean by perfect timings? 52 Hz is unusual. Have you installed the latest graphics driver?

[vigan1]

Yes Latest driver and old also same results. Tried 1709 and 2004, same results.

Did you read the edit I made in my previous post ?

It might be an edid corruption.
Maybe because I updated to the latest bios ?

I have extracted the edid with Entech MonInfo Monitor Asset Manager, and here is what it said :
https://ctxt.io/2/AAAguPg5FA

Do you have any idea what would cause it ?

EDIT : By perfect timing I meant 20ms frame, which is an even number

[ToastyX]

(08-24-2020 05:12 PM)vigan1 Wrote:  Yes Latest driver and old also same results. Tried 1709 and 2004, same results.

Did you read the edit I made in my previous post ?

It might be an edid corruption.
Maybe because I updated to the latest bios ?

I have extracted the edid with Entech MonInfo Monitor Asset Manager, and here is what it said :
https://ctxt.io/2/AAAguPg5FA

Do you have any idea what would cause it ?

EDIT : By perfect timing I meant 20ms frame, which is an even number

The EDID doesn't look corrupted. The range limits also says 52 Hz. You can get exactly 50 Hz by changing the vertical total to 2065.

[joevt]

(08-24-2020 05:12 PM)vigan1 Wrote:  Yes Latest driver and old also same results. Tried 1709 and 2004, same results.

It might be an edid corruption.
Maybe because I updated to the latest bios ?

I have extracted the edid with Entech MonInfo Monitor Asset Manager, and here is what it said :
https://ctxt.io/2/AAAguPg5FA

Do you have any idea what would cause it ?

EDIT : By perfect timing I meant 20ms frame, which is an even number

edid-decode says this:

Code:

EDID version: 1.4
FAIL: Manufacturer name field contains garbage
Manufacturer: MS_ Model 3 Serial Number 3
Made in year 2002
Digital display
8 bits per primary color channel
DisplayPort interface
Maximum image size: 28 cm x 19 cm
Gamma is defined in an extension block
DPMS levels: Off
Supported color formats: RGB 4:4:4, YCrCb 4:4:4
Default (sRGB) color space is primary color space
FAIL: sRGB is signaled, but the chromaticities do not match
First detailed timing includes the native pixel format and preferred refresh rate
Display is continuous frequency
Color Characteristics
  Red:   0.6250, 0.3398
  Green: 0.2851, 0.6054
  Blue:  0.1484, 0.0625
  White: 0.2812, 0.3085
Established Timings I & II: none
Standard Timings: none
Detailed mode: Clock 361.000 MHz, 285 mm x 190 mm
               3000 3008 3016 3360 (  8   8 344)
               2000 2008 2016 2064 (  8   8  48)
               +hsync +vsync
               VertFreq: 52.054 Hz, HorFreq: 107.440 kHz
Display Product Name: HXTE133E27I3P
Display Range Limits
  Monitor ranges (GTF): 52-52 Hz V, 176-176 kHz H, max dotclock 370 MHz
FAIL: Byte 11 is 0x00 instead of 0x0a
FAIL: Byte 12 is 0x00 instead of 0x20
Empty Descriptor
FAIL: Use Dummy Descriptor instead of all zeroes
Checksum: 0xcd
WARN: One or more of the timings is out of range of the Monitor Ranges:
    Vertical Freq: 52 - 52 Hz (Monitor: 52 - 52 Hz)
    Horizontal Freq: 107.440 - 107.440 kHz (Monitor: 176.000 - 176.000 kHz)
    Maximum Clock: 361.000 MHz (Monitor: 370.000 MHz)

Fix the vertical freq range so it is between 49 and 52 Hz.
Fix the last descriptor so that it uses Dummy Descriptor bytes (000000100000000000000000000000000000) instead of zero bytes (000000000000000000000000000000000000). Descriptors containing only zero bytes are Empty Descriptors which are used only in the CTA block.

Below are some timings with the pixel clock altered to get closer to 50 Hz (to 1/1000th of a Hz maybe)

Code:

timing  w   ,hfp,hsw,hbp,   h,vfp,vsw,vbp,  pclk,positive hsync
GTF     3000,228,329,557,2000,  1,  3, 54,423331,5
CVT     3000,228,329,557,2000,  3, 10, 47,423742,5
CVT-RB  3000, 48, 32, 80,2000,  3, 10, 35,323584,5
CVT-RB2 3000,  8, 32, 40,2000, 34,  8,  6,315392,5

It's impossible to get exactly 50 Hz. Pixel clock should be integer MHz to guarantee that a GPU will try to achieve it exactly, otherwise a GPU may round the pixel clock to the nearest 0.25 MHz or 0.10 MHz or 0.01 MHz or whatever precision the GPU uses which will then change the refresh rate. If the pixel clock changes but you want the refresh rate to remain the same, then you need to alter the number of pixels in the horizontal or vertical blanking.

[vigan1]

Thank you guys. I think I know what is going on.

I updated the bios, then my laptop changed from default using "Generic PnP monitor" inf, to "Digital Flat panel (1024*768 60Hz)" inf, after a fresh windows install. Which is in itself weird, since my laptop use the surface book display and the resolution on the desktop is still 3000*2000.

When I uninstall the Intel drivers, I can set back the "Generic PnP monitor" and indeed I see that the screen is 64Hz. But when reinstall the drivers, it get back to 52hz LOCKED automatically. It seems that the intel drivers default to the internal EDID of the screen (which was updated with the new bios). Intel choose and lock 52Hz and also select "Digital Flat panel (1024*768 60Hz)" inf in the device manager. On linux the drivers don't care and choose 3000*2000*59.99Hz.

The bios/Firmware update messed up everything.

Prior the Bios update I had a problem with screen flicker, then the manufacturer relased another bios to fix the problem.

With the 1st bios my monitor was identified as MONITOR/MEI96A2 vendor (surface book 13.5" windows update installed "SurfaceDisplay.inf").
Now with the 2nd bios it is MONITOR/MS_0003 so the edid/firmware was probably changed !!!

Do you know what I could do to get only the EDID or the screen firmware back but keep the new bios ?

Can I send you the bios and firmware file of the 2 bios ?
Can a windows EDID override fix the problem, or is it at a deeper level like screen firmware ?

Thank you and sorry it is not on the topic anymore...

[ToastyX]

(08-24-2020 08:33 PM)vigan1 Wrote:  When I uninstall the Intel drivers, I can set back the "Generic PnP monitor" and indeed I see that the screen is 64Hz.

The default basic display driver always lists 64 Hz. That's not the true refresh rate. Are you able to set 60 Hz with CRU?

[vigan1]

No it does not allow me to set anything but 52Hz.
But the other resolutions 50Hz and 25Hz, don't appear in Windows "Display adapter properties", the drop down menu only shows 52Hz.
EDIT : EVEN when I delete the 52Hz resolution in CRU, then put another one at 25Hz, after restart the 52Hz is back !!!

I can't select them also in the intel Graphic control Panel, it only show 52Hz, and I can't set custom resolution there (out of range even if I create a 800*600*30Hz...).

But CRU works and the custom resolutions can be found; in the intel control panel, under "Option and Support" "Built-in display" "supported Modes", here I can see the 2 of them listed alongside the Locked "3000 x 2000 (52p Hz)". But I can't choose them.

I really think the EDID or firmware is flawed. And the intel driver can only use the range 52Hz to 52Hz.
When I capture the EDID of my HDMI screen the range is 50 to 75Hz.

Any idea what it could be ? I am lost.

My panel is Panasonic MEI96A2, product name VVX14P048M00.
I found an EDID here : https://linux-hardware.org/index.php?pro...2&log=edid
Can someone make me an EDID override INF from this ?

EDIT : Hi guys I reinstalled windows, then installed the latest intel drivers here (igfx_win10_100.8587.exe).
I am still locked at 52Hz. Then I Used CRU deleted the 52Hz Resolution from it. Added another one at 50Hz, Restarted.
Here is the result after the restart : the 52Hz is still there, and I can't select another resolution but the 52hz :
https://i.postimg.cc/FKgTJ1KP/Capture.png

Second method : I used Ntlite to remove all Monitor drivers/INF from the ISO. Installed the modified iso, and intel drivers still pick 52Hz !!!
Is it possible to lock a screen refresh rate from the bios ?
I will recheck under linux and see if I have real 60hz or dropped frames.