Centos 7 cant recognise HDMI - Intel UHD Graphics card - no driver

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BigDog
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Joined: 2019/01/24 03:18:57

Centos 7 cant recognise HDMI - Intel UHD Graphics card - no driver

Post by BigDog » 2020/09/03 02:05:23

Hi Community

I currently have a Lenovo X1 Gen 7 laptop R1 model. This comes with an unidentified model of an intel graphics card which appears to have no driver support in Centos 7 version (3.10.0-1127.18.2.el7.x86_64). This is preventing me from attaching the laptop to my external monitor.

The output of inxi -G shows

Graphics: Device-1: Intel UHD Graphics driver: N/A
Device-2: IMC Networks type: USB driver: uvcvideo
Display: server: X.org 1.20.4 driver: vesa unloaded: fbdev,modesetting tty: 166x28
Message: Advanced graphics data unavailable in console for root.

The output of lshw -class display shows

*-display UNCLAIMED
description: VGA compatible controller
product: UHD Graphics
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 02
width: 64 bits
clock: 33MHz
capabilities: pciexpress msi pm vga_controller bus_master cap_list
configuration: latency=0
resources: memory:e9000000-e9ffffff memory:c0000000-cfffffff ioport:2000(size=64)

lsmod shows that the i915 driver which provides support for other graphics cards such as the Intel UHD 620 is installed. I dont think this i915 driver works for the model of laptop and graphics card I have.

#lsmod | grep video | grep i915
video 24538 1 i915

Has anyone else experienced this with the model of laptop I have and can suggest fixes pls? I have searched high and low for an appropriate driver but no luck so far.

Thanks

BigDog

tunk
Posts: 768
Joined: 2017/02/22 15:08:17

Re: Centos 7 cant recognise HDMI - Intel UHD Graphics card - no driver

Post by tunk » 2020/09/03 09:45:46

Don't know if it will make any difference; run yum update
to get the latest kernel (3.10.0-1127.18.2 isn't the newest).

BigDog
Posts: 7
Joined: 2019/01/24 03:18:57

Re: Centos 7 cant recognise HDMI - Intel UHD Graphics card - no driver

Post by BigDog » 2020/09/03 11:27:20

Thanks for the reply - I have run yum update to its latest now but still no joy. A further bit of info i came across was that the cpu in this laptop is Intel's Comet Lake. Does any one know if drivers for centos have been developed for the cpu and associated graphics card?

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TrevorH
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Re: Centos 7 cant recognise HDMI - Intel UHD Graphics card - no driver

Post by TrevorH » 2020/09/03 11:34:42

Post the output from lspci -nn | grep -i vga
CentOS 6 will die in November 2020 - migrate sooner rather than later!
Info for USB installs on http://wiki.centos.org/HowTos/InstallFromUSBkey
CentOS 5 is dead, do not use it.
Full time Geek, part time moderator. Use the FAQ Luke

BigDog
Posts: 7
Joined: 2019/01/24 03:18:57

Re: Centos 7 cant recognise HDMI - Intel UHD Graphics card - no driver

Post by BigDog » 2020/09/06 03:22:41

Hi

Thanks Trevor - I have been playing around and updated to a mainline version of the Centos Kernel (Linux 5.8.5-1.el7.elrepo.x86_64 x86_64). This now recognises and provides the drivers I need and can see the graphics card successfully. This is confirmed as follows.

inxi -G
Graphics: Device-1: Intel UHD Graphics 620 driver: i915 v: kernel
Device-2: Acer type: USB driver: uvcvideo
Display: x11 server: X.Org 1.20.4 driver: modesetting unloaded: fbdev,vesa resolution: 1920x1080~60Hz
OpenGL: renderer: Mesa DRI Intel UHD Graphics 620 (Kabylake GT2) v: 4.5 Mesa 18.3.4

One of the issues with installing the mainline version of Centos is that it is not signed so if you have secureboot enabled on your laptop the new kernel will not boot. You will need to import El-repo secure boot key into your MOK list using mokutil. (see https://elrepo.org/tiki/SecureBootKey)

Not sure if this classifies as a new question but does any know of any major disadvantages of using this mainline kernel version, especially from a security perspective, as opposed to the one issued by Centos?

Thanks

Tim

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TrevorH
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Re: Centos 7 cant recognise HDMI - Intel UHD Graphics card - no driver

Post by TrevorH » 2020/09/06 14:56:03

First thing is, it's not a CentOS kernel. It is provided by ELRepo who, while very respectable people, half of whom "person" the moderator team on this forum, it's not a CentOS one and it doesn't have the stable KABI of CentOS kernels. It's also prone to upstream breakage since it's providing the very latest mainline linux kernel obtained by building the latest source that Linus makes available.

You never did provide the output from lspci -nn | grep - vga
CentOS 6 will die in November 2020 - migrate sooner rather than later!
Info for USB installs on http://wiki.centos.org/HowTos/InstallFromUSBkey
CentOS 5 is dead, do not use it.
Full time Geek, part time moderator. Use the FAQ Luke

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