No Intel DRI device under 5.6.13-gentoo available

[happosai]

Hi!

I am running Gentoo Linux on a small Asus Beelink device, which uses an Intel Atom x5-Z8350 CPU as small media box with Kodi.

It's been running since a long time under kernel version 4.19.82-gentoo without any problems: X11 works using the builtin GPU of the CPU and so does Kodi.

Now I tried to update my kernel version to 5.6.13-gentoo, using the working 4.19.82-gentoo kernel configuration as starting point for it, and this is really annoying me since days: the kernel runs and boots, but it does now not provide a /dev/dri/card0 interface and therefore X11 is unable to start at all.

I've been looking at the Wiki page https://wiki.gentoo.org/wiki/Intel and tried to implement that, sadly it did not lead to a working kernel.

Tried modesetting as well as old drivers - no chance.

Is the kernel version 5.6.13 having some known issues with the builtin graphics of this CPU, or what else could I do to get this kernel finally in a working condition?

[Jaglover]

I would start with comparing dmesg. You could also post your kernel config, more eyes looking at it may help.
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[happosai]

Sure thing, the issue is that the 5.6.13 kernel has no boot lines of the DRI interface; the older kernel does.

So here we go...

4.19.82-gentoo kernel config: https://pastebin.com/D7ygus4K
5.6.13-gentoo kernel config: https://pastebin.com/baz2SKmA

Boot log 4.19.82: https://pastebin.com/EHH5g0tx
Boot log 5.6.13: https://pastebin.com/8FZ2h7fw

The difference between 4.19.82 and 5.6.13 is that in 4.19.82 inteldrmfb is taking over the console, which does not happen in 5.6.13. The I915 kernel driver is just not initializing/firing up under 5.6.13 at all.

[Jaglover]

What is the PCI ID of your graphics? There is an option in kernel to force loading i915 even if the PCI ID does not match the list of supported devices, have you tried turning it on?
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[pietinger]

Just a guess: Does your small media box boot with UEFI ? If yes, you could try this:

[happosai]

Hi, I have added the EFI FB device. No change.

Kernel config 5.6.13-gentoo: https://pastebin.com/YsJU5C9h
Boot log: https://pastebin.com/9gxR86ju

PCI ID is 00:02.0:

musicbox ~ # lspci
00:00.0 Host bridge: Intel Corporation Atom/Celeron/Pentium Processor x5-E8000/J3xxx/N3xxx Series SoC Transaction Register (rev 36)
00:02.0 VGA compatible controller: Intel Corporation Atom/Celeron/Pentium Processor x5-E8000/J3xxx/N3xxx Series PCI Configuration Registers (rev 36)

Tried to load I915 as module with force_probe parameter - no improvement.

[Jaglover]

[happosai]

I used another kernel version for the test where I915 was a module; but now the in kernel version as well.

musicbox# lspci
00:00.0 Host bridge: Intel Corporation Atom/Celeron/Pentium Processor x5-E8000/J3xxx/N3xxx Series SoC Transaction Register (rev 36)
00:02.0 VGA compatible controller: Intel Corporation Atom/Celeron/Pentium Processor x5-E8000/J3xxx/N3xxx Series PCI Configuration Registers (rev 36)


PCI ID is here: 00:02.0 0300: 8086:22b0 (rev 36)

Kernel 5.6.13 again.

No change.

Kernel config: https://pastebin.com/KD9V1XjJ
Boot log: https://pastebin.com/TusfCS1Z

[pietinger]

[happosai]

Yes, I am sure about that. What makes you think different?

[Jaglover]

Your PCI ID is certainly listed as supported. This seems to be some SoC? You should enable correct platform support under PINCTRL and GPIO. If I had this issue I also would try the 5.7 kernel. And the latest 5.6. Sometimes there are regressions.
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