[Solved] Intel graphics driver Core I5 Xorg resolution

[ALF__]

****Cable issue ****

Hi guys,

Trying to set up a Dell Optiplex 3020 as a spare workstation, was hoping to use integrated graphics, but running in to resolution problem.

The system contains a I5 4590 (4th gen if i have the correct information)

So far, it is just a standard stage 3 install, with Xorg and Fluxbox.
X starts and run with no errors, however, it sticks with 1024x768 resolution.
Tried to specify preferred mode, and it does recognize the config file, but still uses 1024x768. No errors as to why.
So i scrapped that, since it seems nowadays that the configuration is mostly done automatically if all is good.
Removed the monitor file to get back to basics.

Im pretty lost at this point, so i include Xorg log, and some relevant configuration files if someone can take a look.

My first time fighting Intel drivers. Might be defeated by the old sport of trying to slim down the kernel-configuration to much?

Kernel config: https://pastebin.com/Sa5A1cg6

dmesg: https://pastebin.com/WepuJHw1

Xorg log: https://pastebin.com/GUHsxaha


And finally lspci output:

[NeddySeagoon]

ALF__,

Xorg should ask your display for its capabilities. Some drivers print it in the log, some don't.

[mike155]

[ALF__]

Hey NeddySeagoon,

As always, thanks for your reply.

I did add both DRM_LOAD_EDID_FIRMWARE and also FIRMWARE_EDID to the kernel.

Also, added all the INTEL drivers under I2C hardware bus support. However, get-edid still returns No edid on buses 0-6
1 potential bus found: 7
Bus 7 doesn't really have an EDID.

Not sure what problem that would indicate?

Well, the screen is a Philips 273Eqh. Its old. but not super old
I use it on my main T7500 system with a nvidia card without issues. As i side note the idea is to create a temporary replacement for my dual processor T7500 since it superheats the room:)

[Jaglover]

If for any reason it is unable to fetch EDID, then, as a workaround, you can use some other computer to get the EDID and load it from a file.
_________________
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Please learn how to denote units correctly!

[ALF__]

[NeddySeagoon]

ALF__,

This page says its 1920 x 1080.
That's bound to be 60Hz too.

I've not done a Modeline for a very long time but the modeline generator is still there.

[ALF__]

Thanks!

I added that to a config-file.

This causes the server to hang during startup, and need to kill it harshly.

The only thing pointing to a problem with it is this line in the log:

[Jaglover]

What happens when you use modesetting instead of intel?
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Please learn how to denote units correctly!

[ALF__]

Good question!

Can I force it to use modesetting, or so I need to remove intel from kernel?

[Jaglover]

Modesetting I have in mind is Xorg driver, not kernel. Usually Xorg defaults to modesetting when intel driver is not set in conf and some suggest it is correct choice for Intel. In case it does not you can use this four-liner.

[ALF__]

Xorg is emerged with intel set in makeconf as graphic cards.

Is a re-emerged needed to force mode setting you’d think?

[NeddySeagoon]

ALF__,

I have no idea what the maximum pixel clock is allowed to be, so it might not like the 182.28MHz pixel clock requested in the Modeline.
If you must have a lower pixel clock, the image will be interlaced, like analogue TV.

The Refresh rate is actually 60.1Hz, rather than the 60Hz requested.
Reducing the pixel clock to 181.97 would reduce the refresh rate.

Each pixel lasts 1/182.28 microseconds.
There are 2672 total pixels on each line
Each frame is made up of 1135 lines.

So a frame time is 2672*1135/182.28 microseconds.
That's 16637.700241387 microseconds per frame. and we want 16666.66666...

Doing it that way I get a pixel clock of 181.96MHz.

The Xorg log might have more information.

-- edit --

[ALF__]

Thanks for the explanation.
However I’m not quite sure I’m following here.

I think we need to get back to basic.
The screen have been in my possession for several years and on multiple machines without issues.
The new player is the computer it self, but i feel it is a pretty standard one.


Something is off with either my configuration or the intel driver it self.
Probably not the driver, but my configuration

Even if calculating pixel clocks and so on would make it work, it feels a bit strange.
This is a pretty vanilla computer with a vanilla screen so automatically really should work I feel.

Any input on what might be missed here is greatly appreciated.

[NeddySeagoon]

ALF__,

The display does not advertise its native resolution on the VGA input. See my edit above.
Can you test it using a digital input?

The automatics everything is working fine but its not want you want.

The console resolution will be wrong too, as that uses the EDID data to get the resolution to use.
_________________
Regards,

NeddySeagoon

Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail.

[Jaglover]

Any other computer which can read the EDID out from this monitor would also display correct modelines in Xorg log.
_________________
My Gentoo installation notes.
Please learn how to denote units correctly!

[ALF__]

Well guys,

Thanks for all your help.

The case is solved.
Firstly I tried with another screen. The same issue.
Then i exchanged the VGA cable, and everything played nice. Including get EDID.
Can you believe it?


Once again, thank you very much for your help and patience