Windows dual GPU: invalid memory address or nil pointer dereference

[veliev]

I read the topic #148 with a similar question. I did not find a solution in it. Пробовал откатить версию OpenGL
git checkout downgrage_opengl
Got an error

error: pathspec 'downgrage_opengl' did not match any file(s) known to git

Demo code:

package main

import (
	"fyne.io/fyne/app"
	"fyne.io/fyne/widget"
)

func main() {
	app := app.New()

	w := app.NewWindow("Hello")
	w.SetContent(widget.NewVBox(
		widget.NewLabel("Hello Fyne!"),
		widget.NewButton("Quit", func() {
			app.Quit()
		}),
	))
	w.ShowAndRun()
}

error

2019/03/27 15:20:45 Fyne error: failed to initialise OpenGL
2019/03/27 15:20:45 Cause: glClientWaitSync
2019/03/27 15:20:45 At: C:/Users/ivc-tveliev/go/src/fyne.io/fyne/driver/gl/window.go:843
panic: runtime error: invalid memory address or nil pointer dereference
[signal 0xc0000005 code=0x0 addr=0x10 pc=0x5f717d]

goroutine 1 [running, locked to thread]:
fyne.io/fyne/driver/gl.(*window).SetContent(0x0, 0xeee9a0, 0xc000050b40)
C:/Users/ivc-tveliev/go/src/fyne.io/fyne/driver/gl/window.go:329 +0x2d
main.main()
C:/gopath/src/Ihtest/СИС.go:26 +0x296
exit status 2

Windows 7 64

[andydotxyz]

The downgrade_opengl branch was merged to master for the release so you already have the latest code from 'go get'.
Is it possible to provide more information about the hardware, specifically graphics card / chip on your device?

[veliev]

@andydotxyz
CPU Type DualCore Intel Pentium G620, 2600 MHz (26 x 100)
Motherboard Name Fujitsu D3061-A1
Motherboard Chipset Intel Cougar Point Q65, Intel Sandy Bridge
Video Adapter Intel(R) HD Graphics Family (3932380 KB)

OpenGL Properties:
Vendor Intel
Renderer Intel(R) HD Graphics Family
Version 3.0.0 - Build 8.15.10.2342
Shading Language Version 1.30 - Intel Build 8.15.10.2342
OpenGL DLL 6.1.7600.16385(win7_rtm.090713-1255)
Multitexture Texture Units 8
Occlusion Query Counter Bits 64
Sub-Pixel Precision 4-bit
OpenGL Compliancy:
OpenGL 1.1 Yes (100%)
OpenGL 1.2 Yes (100%)
OpenGL 1.3 Yes (100%)
OpenGL 1.4 Yes (100%)
OpenGL 1.5 Yes (100%)
OpenGL 2.0 Yes (100%)
OpenGL 2.1 Yes (100%)
OpenGL 3.0 Yes (100%)
OpenGL 3.1 No (50%)

[th3noname]

I have a similar problem on my notebook which has a Nvidia optimus hybrid gpu. By default the app launches on the integrated gpu (Intel HD graphics 3000) and i get a similar error (nil pointer) but a different cause (have to check later today). If i configure the app to start on the nvidia gpu everything works just fine.

[andydotxyz]

@veliev For a while we required OpenGL 3.2 so it would not have worked but now it's 2.0 so it should be fine on that computer.

Can you confirm which git commit is current in your version of fyne please? ($GOPATH/src/fyne.io/fyne/ )

[th3noname]

I finaly got the time to test this again. Same problem with the current fyne version (did a pull and rebuild)

2019/04/03 18:01:04 Fyne error:  failed to initialise OpenGL
2019/04/03 18:01:05   Cause: glGetBufferParameteri64v
2019/04/03 18:01:05   At: C:/Users/Jan/go/src/fyne.io/fyne/driver/gl/window.go:8
34
panic: runtime error: invalid memory address or nil pointer dereference
[signal 0xc0000005 code=0x0 addr=0x10 pc=0x5f311d]

goroutine 1 [running, locked to thread]:
fyne.io/fyne/driver/gl.(*window).SetContent(0x0, 0xf65840, 0xc00007c230)
        C:/Users/Jan/go/src/fyne.io/fyne/driver/gl/window.go:314 +0x2d
main.welcome(0xf658a0, 0xc00003e6c0)
        C:/Users/Jan/go/src/github.com/fyne-io/examples/main.go:52 +0x2ca
main.main()
        C:/Users/Jan/go/src/github.com/fyne-io/examples/main.go:86 +0xa89

[andydotxyz]

Thanks @th3noname this is strange indeed. I have read up on that chip and it is indeed supported by the code that we have written. This leads me to wonder about the operating system drivers. Does the inbuilt graphics hardware have the latest driver installed? Is the Windows installation completely up to date with all drivers and patches?

I know it's probably obvious but I have to ask...

[th3noname]

That was the first thing i checked and they are up to date.

One curious thing i noticed is that GPU Caps Viewer reports no OpenGL Version for the internal Intel based GPU. It just says that this is not the primary OpenGL GPU. I wonder if the problem is just that fyne doesn't properly indicate what GPU it needs to run on? I'm not shure how Nvidia Optimus detects that.

[th3noname]

A quick Google search got me the Nvidia Optimus developer guid:

http://developer.download.nvidia.com/devzone/devcenter/gamegraphics/files/OptimusRenderingPolicies.pdf

The most promising way seems to be the "Global Variable" option. I'm going to try that option (probably next week) and report back the results.

[andydotxyz]

oh, excellent - let us know how that goes, thanks.

[tgmeow]

I am also getting this issue.
Windows 10, i5 2520M (Intel HD 3000)
For me at least, there also seems to be an issue with basic OpenGL support on my machine, since other OpenGL programs don't seem to be working either. (even though various programs give information that OpenGL should work.)

However, everything works fine when I build and run my program inside a local Ubuntu virtual machine.

[andydotxyz]

Sorry @tgmeow, but it looks like that GPU is not supported in Windows 10 so I don't know that we can help. https://forums.intel.com/s/question/0D50P0000490V76SAE/i-need-opengl-for-hd-graphics-3000-under-win10?language=en_US

[SuperKirik]

@andydotxyz
We faced the same issue on one of our testing computers.

This is virtual Windows 8.1 Corporate started on VMware Workstation

Here the screenshots with Windows and OpenGL details
(sorry for Russian on the screenshots)

I was looking through some of the similar issues but didn't find the answer... As I understood it may be related to OpenGL version. In our case, it is really the old one - 2.1, but fyne currently supports OpenGL starting from 2.0 as I understood.

The main point is could it happen with a wide range of users ?
It would be good to understand what is the actual reason for this to understand how much users it could affect

)

[andydotxyz]

@SuperKirik Can you please provide the whole error? It's the beginning of the log that will help us most.
This is an issue that is specific to virtual machines and headless computers (as well as a few really out of date Windows graphics drivers and some systems configured to only use CPU-emulated GPUs). It is not a widespread issue, though we do want to continually improve :).

It is possible that your VM is capable of OpenGL 2.0 but that your installation does not have graphics drivers installed?

[SuperKirik]

Thank you for the clarification!

The error is flashing fast in the window... so didn't find a way to get it, other than record the video :) here the ordinal screenshots:

dxdiag in 'Display' tab 'Drivers' section shows the following information:

Version: 7.14.1.5026,
Feautures level:9.3, 9.2,9.1,
Driver Model: WDDM 1.0,

[SuperKirik]

I just noticed that the other build (I did it later in the new directory from the beginning) showed some other error stack trace.

[changkun]

As I read though this bug report, it looks like this is a hardware/driver issue in the system which irrelevant to fyne itself and somewhat relates to glfw?

Since there is a lack of information, shall we close this?

[Jacalz]

I think so too. We have had a lot of issues in the past with missing driver support on Windows (drivers usually aren't installed or don't expose a new enough OpenGL version) and especially on virtual machines where hardware acceleration might not be turned on. Thoughts @andydotxyz?

[Bluebugs]

We have seen quite a few issue on Windows due to OpenGL driver not being preset, or wrong version. It make me wonder if we could not do more check at startup to make sure that the driver looks ok and report on the console of any issue before starting the application.

[andydotxyz]

It make me wonder if we could not do more check at startup to make sure that the driver looks ok and report on the console of any issue before starting the application.

That does make sense, though the top of the panic was 2019/03/27 15:20:45 Fyne error: failed to initialise OpenGL, so we are making an attempt already.
I think the one real issue we have to resolve on Windows is the dual-GPU where builtin does not support OpenGL and the larger GPU does... If this issue does not look like that case then it can be closed.

[allesharr]

Hey, I have the same issue on my RPI 4b with basic fyne-demo program. Is any solution exist on linux-base systems?

[Jacalz]

Hey, I have the same issue on my RPI 4b with basic fyne-demo program. Is any solution exist on linux-base systems?

I think this issue is mostly Windows related. Would you mind opening a new issue, with all the relevant information, so we can have a look at it?