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kabirbg
n00b
Joined: 30 Jun 2022
Posts: 5
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 Posted: Thu Jun 30, 2022 9:18 pm Post subject: 1024x768 aspect ratio gets stretched across 2560x1080 screen |
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Hi all,
New gentoo user here. I have a 2560x1080 ultrawide (21:9) display, something that is cool to look at but has given me a lot of headache getting set up with Xorg! I am using bspwm and the gentoo dist kernel (not my own configuration). Running xrandr gives me:
| Code: | xrandr: Failed to get size of gamma for output default
Screen 0: minimum 1024 x 768, current 1024 x 768, maximum 1024 x 768
default connected 1024x768+0+0 0mm x 0mm
1024x768 76.00* |
I cannot add a new resolution or change the resolution using xrandr. I have looked all around and found various solutions on the internet, but none of them worked for me. It says Screen 0 only supports 1024 x 768, but in reality the physical monitor supports much higher resolutions.
I'm using Intel integrated graphics (Intel UHD 770, Alder Lake, if that helps); I set VIDEO_CARDS="intel" in my /etc/portage/make.conf. Do I need to add i915, fbdev and/or vesa? I tried adding them and removing but it made no difference (unless rebuilding xorg-server is not the right course of action and it's some other ebuild that uses the VIDEO_CARDS option).
Any help would be much appreciated! |
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NeddySeagoon
Administrator
Joined: 05 Jul 2003
Posts: 54214
Location: 56N 3W
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| Posted: Thu Jun 30, 2022 10:09 pm Post subject: |
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kabirbg,
Welcome to Gentoo.
Use wgetpaste to share the output of the dmesg command and your Xorg.0.log.
That will show what the kernel and Xorg did as they started.
It sounds like you are using the wrong video driver for your hardware but the logs will help.
will rebuild everything affected by a USE flag change.
You would want xorg-drivers, mesa and libdrm.
_________________
Regards,
NeddySeagoon
Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail. |
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kabirbg
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Joined: 30 Jun 2022
Posts: 5
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NeddySeagoon
Administrator
Joined: 05 Jul 2003
Posts: 54214
Location: 56N 3W
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| Posted: Fri Jul 01, 2022 7:26 am Post subject: |
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kabirbg,
| Code: | [ 860.526] (==) Matched intel as autoconfigured driver 0
[ 860.526] (==) Matched modesetting as autoconfigured driver 1
[ 860.526] (==) Matched fbdev as autoconfigured driver 2
[ 860.526] (==) Matched vesa as autoconfigured driver 3 |
Good. The auto detect did its thing and says that the intel driver is best for you.
| Code: | [ 860.526] (==) Assigned the driver to the xf86ConfigLayout
[ 860.526] (II) LoadModule: "intel"
[ 860.526] (WW) Warning, couldn't open module intel |
but its not built.
| Code: | | emerge -1av xorg-drivers mesa |
and checx the VIDEO_CARDS intel is not shown is green with an *.
If it is, run the emerge to build intel support. If its Red, you have it.
| Code: | [ 860.527] (II) modesetting: Driver for Modesetting Kernel Drivers: kms
[ 860.527] (EE) open /dev/dri/card0: No such file or directory |
Your kernel is missing kernel modesetting support. That's a kernel rebuild.
You need DRI support and i915 support.
_________________
Regards,
NeddySeagoon
Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail. |
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kabirbg
n00b
Joined: 30 Jun 2022
Posts: 5
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| Posted: Fri Jul 01, 2022 4:41 pm Post subject: |
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Hi,
It's showing VIDEO_CARDS="intel" in red for both xorg-drivers and mesa.
I see, I'll have to rebuild the kernel... I'm using a distkernel though, so I assumed that would have KMS built in. Does this mean I have to configure my own kernel and not use the distkernel, or is there another route? (The reason I am iffy about this is because when I tried configuring my own, I got an unbootable system, whereas the distkernel worked perfectly for me and so I felt like I would do something wrong if I tried to manually configure...)
--------
EDIT: I read the wiki article and I can just add a one-line config change still using the dist-kernel. Which is perfect. So I'll try that and let you know!
Thank you so much!! |
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kabirbg
n00b
Joined: 30 Jun 2022
Posts: 5
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| Posted: Sun Jul 03, 2022 2:05 am Post subject: |
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Hi NeddySeagoon,
I applied your changes (specifically, adding a file in /etc/kernel/config.d to set CONFIG_DRM=y and CONFIG_DRM_I915=y), but the result is the same. In the Xorg log, it is the same as before (intel, vesa or fbdev could not be loaded) except that modesetting is loaded, but open /dev/dri/card0 still fails.
Are there other config options I need enable as well? |
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