topic Re: [9024844] Custom resolution not working in Graphics

[9024844] Custom resolution not working

RCarl6 — Fri, 07 Aug 2015 02:02:27 GMT

I emailed Intel Customer Support Service and they refer me to this forum because the agent say it will have the correct exposure to intel engineering department. (request # 8001214860)

The problem is Intel Graphics driver for HD 4600 (and presumably others too) have a broken custom resolution for Built in LCD. No matter what setting you put into it, it will always custom resolution exceeds the maximum bandwidth capacity.

I tested it on many different laptop with eDP (embedded displayport) like Alienware 17, Asus G751JM, Asus Q551LN, Lenovo Y50-70, Razer Blade 14, MSI GT60 Dominator Pro, and Gigabyte P34 and they all say custom resolution exceeds the maximum bandwidth capacity.

To establish the fact that bandwidth is not the problem, I tried creating a custom resolution at native res (1920x1080) at 59Hz (default is 60Hz) and it says custom resolution exceeds the maximum bandwidth capacity. To test it further I downscale the resolution to 1600x900 @ 59Hz and it still gives the error so I conclude the problem is with the driver itself.

I tried the oldest and newest driver from the OEM and the one on Intel website and they are all broken.

The problem is NOT ISOLATED on a laptop model or a manufacturer but the Intel Graphics driver itself.

In fact if you verify the problem by testing it on ANY laptop that has an Intel graphics and try to create a custom resolution that is 1Hz less than native (like 59Hz) and it will give you the same error.

So why does it matter? Almost every single gaming laptop that is being released are NVIDIA Optimus Enabled (Hybrid Graphics where Intel Graphics is handling the display) and it prevents people from changing the refresh rate of the display. As an example the LCD panel found on Asus G751JM-BHI7T25 uses LG LP156WF4 SPL1 which is the exact same panel found on Asus G751JY that comes at 75Hz by default, but we cannot change the refresh rate due to broken Intel Custom Resolution even though the LCD panel itself is more than capable to handle it.

Refresh rate is a huge feature as evident on monitors getting released (like BenQ XL2430T, Asus ROG Swift, Acer Predator, etc...) and if you ask any gamer that has tried a high refresh rate monitor they will tell you how much big of a difference it is and because of this issue, any gaming laptop that has Hybrid graphics (Intel Graphics enabled) is a HUGE deal breaker.

[Edit by Bryce@Intel]: Changed title to reflect investigation bug# and title.

Old title: Intel driver is completely broken (custom resolution)

Re: [9024844] Custom resolution not working

JZuid — Fri, 07 Aug 2015 06:15:12 GMT

On my Intel HD Graphics 4600 powered Optimus laptop, I don't use custom resolutions, but I can't scale games to get rid of black bars for the life of me due to an issue that hasn't even really been confirmed as an ACTUAL issue yet.

Intel / nVidia have a lot of work to do regardless, so you are not alone in your struggles.

However, regarding your specific issue, I'm 99% positive its been reproduced and is being worked on.

Re: [9024844] Custom resolution not working

RCarl6 — Fri, 07 Aug 2015 18:35:58 GMT

How did you come to the conclusion that the custom resolution problem is being worked on? Did an Intel engineer or representative specifically acknowledge the issue and promised a fix?

A quick google search shows this issue has exist for multiple years now.

Every single result I saw Intel blaming the specific laptop model or manufacturer for the custom resolution problem which doesn't make any sense because It doesn't matter what laptop model or manufacturer you are using as the Intel driver itself (oldest and newest) have broken Custom Resolution for built in display.

The feature never ever work and will always give an error "custom resolution exceeds the maximum bandwidth capacity" which doesn't make any sense as if that was the case then you should be able to set a custom resolution at native res - 1Hz (59Hz) for the built in display but it still will not work on ANY laptop that has Intel Graphics.

Re: [9024844] Custom resolution not working

JZuid — Fri, 07 Aug 2015 20:07:36 GMT

I'm not positive but I'm almost sure someone else here has posted regarding custom resolutions and it's been said that it's being worked on. Regardless it's not going to work until Intel updates their drivers.

Re: [9024844] Custom resolution not working

RCarl6 — Fri, 07 Aug 2015 20:21:00 GMT

So you are making an assumption that Intel has responded to the issue?

Re: [9024844] Custom resolution not working

Bryce__Intel — Thu, 13 Aug 2015 01:10:41 GMT

xtinct16

Doing a quick search, I see a few threads on this have been posted before. Many of the laptops deal with Switchable Graphics and there can be issues related to mode switching. Alternately, OEM's can customize the vBIOS or drivers to limit resolutions/bitrate either to fix/prevent issues. Have you uninstalled the Intel driver completely and seen the failure? If so, this could mean a MSFT issue or vBIOS customization. I'm not saying we're not at fault, I just don't have enough information to go on. Please review the sticky on the main Graphics page for Default Information When Filing an Issue and provide the answers/attachments here. Once you provide that I'll get someone to try and replicate what you're seeing. Thanks for providing this feedback!

.:Bryce:.

Re: [9024844] Custom resolution not working

RCarl6 — Thu, 13 Aug 2015 01:55:15 GMT

Intel HD Graphics Control Panel is the ONLY way to create a custom resolution and uninstalling the whole thing makes no difference. I also tried BOTH the Intel Graphics driver from the OEM and the one from Intel Website and it makes no difference. I also tried different operating system (Windows 7, 8.1 and 10) and they all have the exact same problem with custom resolution.

I am more than 100% sure it is NOT ISOLATED to a specific laptop model or a manufacturer as I have tried it on many different laptop from different manufacturer (like Alienware 17, Asus G751JM, Asus Q551LN, Lenovo Yoga 2 Pro, Lenovo Y50-70, Razer Blade 14, MSI GT60 Dominator Pro, and Gigabyte P34) with and without switchable graphics.

In fact the FASTEST and EASIEST WAY to VERIFY the problem is try to create a custom resolution for built-in LCD via Intel HD Graphics Control Panel on ANY laptop that has Intel graphics (it doesn't matter if it has switchable graphics or what sku it is e.g. HD 4600), it will always say "custom resolution exceeds the maximum bandwidth capacity" which doesn't make any sense especially if you try a lower setting like at native resolution (1920x1080) and 59Hz (1hz less than original which is 60Hz).

The feature Custom Resolutions for Built-In Display is completely broken and has never ever worked on any laptop or driver version.

Category

Questions

Answers (N/A if not applicable)

Description

Provide a detailed description of the issue AND 'does it fail every single time, or only sometimes?' If you can offer a % rate please do.

Custom Resolutions for Built-In Display is completely broken and has never ever worked on any laptop or driver version. it will always say "custom resolution exceeds the maximum bandwidth capacity" which doesn't make any sense especially if you try a lower setting like at native resolution (1920x1080) and 59Hz (1hz less than original which is 60Hz) or even downscaling the resolution which should lessen the bandwidth requirements. The problem NOT ISOLATED to a specific laptop model or a manufacturer as I have tried it on many different laptop from different manufacturer (like Alienware 17, Asus G751JM, Asus Q551LN, Lenovo Yoga 2 Pro, Lenovo Y50-70, Razer Blade 14, MSI GT60 Dominator Pro, and Gigabyte P34) with and without switchable graphics.

Hardware (HW)

Brand and Model of the system.

It doesn't matter what laptop brand or model but for reference the laptops Ive tried are listed above

Hybrid or switchable graphics system? ie Does it have AMD or NV graphics too?

Tried with laptop that has switchable graphics and no switchable graphics but same problem with custom resolution

Make and model of any Displays that are used to see the issue (see note2 below).

LFP = Local Flat Panel (Laptop panel)

EFP = External Flat Panel (Monitor you plug in)

LFP = Local Flat Panel

For reference my Asus G751JM uses LP156WF4 SPL1 which is connected via eDP (embedded displayport) which is also the exact same panel found on Asus G751JY that comes at 75Hz stock so the hardware is more than capable of changing refresh rate.

How much memory [RAM] in the system (see note2 below).

It doesn't matter but I tried with different laptop models from 4GB to 24GB/

Provide any other hardware needed to replicate the issue.

ie: Cables&brand, cable ty...

Re: [9024844] Custom resolution not working

RCarl6 — Thu, 20 Aug 2015 02:15:48 GMT

Hi is there any update to the issue?

If so is there any plans to fix it in the near future?

Re: [9024844] Custom resolution not working

Bryce__Intel — Thu, 10 Sep 2015 14:16:31 GMT

Hi xtinct16

We were able to replicate this and a bug record is being filed today [9024844]. Issue will then progress to the debug queue. I'll update bug record # when it's available and circle back with updates as they come. Thanks!

Re: [9024844] Custom resolution not working

RCarl6 — Thu, 10 Sep 2015 15:48:08 GMT

Thanks for the reply!

Can you also add timing settings (such as CVT reduced blank, manual, etc...) for the built-in display?

Hopefully you guys won't put a limit especially on custom refresh rate setting.

Majority of laptop LCD can handle at the very least 70Hz without frame skipping and it makes a huge difference.

High refresh rate monitors are becoming extremely popular among gamers and it is very evident as desktop monitor manufacturers are announcing high refresh rates (some even do 165Hz or even 200Hz) monitors.

Re: [9024844] Custom resolution not working

ZSaun — Wed, 16 Sep 2015 00:20:09 GMT

I can also comment on this, all of my laptops also have this issue and I have been waiting a long time for this to be fixed so I can push higher refresh rates to my screens. Asus UX303LN, Clevo W230SS, are the two machines that I have and cannot set higher refresh rates. How long do you think we will have to wait for this to be fixed? Even a very vague estimate would be appreciated.

Re: [9024844] Custom resolution not working

KS_ — Wed, 16 Sep 2015 00:32:10 GMT

Hello everybody,

I would absolutely love for this feature to be fixed. There is virtually no reason to not have this feature built in and working, and this would be an astronomical breakthrough if the custom resolution/refresh rate utility was fixed.

Please, Intel, know how many people want this.

Thank you for taking the time to read this.

Re: [9024844] Custom resolution not working

Bryce__Intel — Wed, 16 Sep 2015 21:37:54 GMT

Yes, it's currently in the debug queue awaiting an engineer with bandwidth to be assigned, this can take time. No new update to share yet. I provided the bug# in the title for tracking. I'll update back when I get more information from my debug team.

Re: [9024844] Custom resolution not working

RCarl6 — Wed, 16 Sep 2015 21:40:59 GMT

Will the fix include Ivy Bridge (HD 4000) or older or is it limited to Haswell and newer?

Re: [9024844] Custom resolution not working

Bryce__Intel — Wed, 16 Sep 2015 21:42:10 GMT

xtinct16

I added your additional info to the investigation record.

ZacharyS

There's no way to tell or estimate time to resolve something until we know what the root cause is. Too many factors involved. As soon as I know something I'll update back here though.

Re: [9024844] Custom resolution not working

KS_ — Wed, 16 Sep 2015 21:43:22 GMT

Hello,

Does that mean that LCD refresh rates will be able to be set over 60 (so they can match LCD manufacturer specs, instead of an arbitrary number - 60)? I really can't stress how important this is to so many people and I remain hopeful that one day this will be possible and Intel will know how important this is to so many people.

Thanks.

Re: [9024844] Custom resolution not working

ZSaun — Wed, 16 Sep 2015 21:45:27 GMT

Alright no problem, Just happy to finally see progress on this even if it's nothing big yet

Also if you need anything tested out let me know because I have a few systems that this issue applies to.

Re: [9024844] Custom resolution not working

Bryce__Intel — Wed, 16 Sep 2015 22:04:29 GMT

I only saw data suggesting HSW+, so if you're saying IVB is failing as well I'll include this datapoint in the record. Not to get ahead of ourselves though, we have to see if it's our bug or not and go from there.

Re: [9024844] Custom resolution not working

RCarl6 — Wed, 16 Sep 2015 22:21:27 GMT

Ivy Bridge and Sandy Bridge also has a broken custom resolution for built in display and would display the same error message "the custom resolution exceeds the maximum bandwidth capacity" which doesn't make any sense especially if you test a less bandwidth intensive setting (like lower resolution or lower refresh rate or both).

NVIDIA has the custom resolution for built-in display working for a few years now and even have advance timing option such as Automatic, GTF, DMT, CVT, CVT reduced blank and manual.

Re: [9024844] Custom resolution not working

ZSaun — Wed, 16 Sep 2015 22:26:01 GMT

Both ivy and sandy are broken on my end as well, and the two laptops that only have nvidia graphics also work with custom resolutions, it's only the laptops with intel gpus that do not.