libreelec nightly regression on amd 2400g

tomtefan · October 16, 2020 at 3:51 PM

With the latest (20201015-c5a4c7d) nightly I'm seeing a regression as it seems to fail to init the gpu on my AMD 2400G, so the box just boots and kodi does not start up, I can ssh into it though.

Relevant stuff from dmesg:

non-working - Pastebin

The nightly (20200928-cf4721a) I used previously works:

working - Pastebin

Let me know if you need anything else.

**Klojum** · October 16, 2020 at 6:02 PM Official Post

Please use pastebin websites for providing log files and other longer outputs. We prefer to keep our forum server clean and lean.

As it's not really my department, the nightly problem is to be looked at by a LibreELEC developer.

tomtefan · October 24, 2020 at 3:43 PM

Still seeing the same issue on nightly-20201024-636e32e

tomtefan · October 26, 2020 at 4:13 PM

So I did a git bisect and got this:

Code

addc2bfa1f3cbd6f876f4b98dac71f33d01cf837 is the first bad commit
commit addc2bfa1f3cbd6f876f4b98dac71f33d01cf837
Author: mglae <[email protected]>
Date:   Sun Oct 4 17:47:30 2020 +0200


linux: add IOMMU support for Generic

Reverting this commit on master and my box boots fine again.

**mglae** · October 26, 2020 at 10:14 PM

Although the commit can easily be reverted can you try if any of iommu=off, iommu=nopt or iommu.passthrough=0 kernel parameters let kodi start.

See kernel-parameters.txt for documentation.

tomtefan · October 27, 2020 at 7:12 PM

mglae

So I've tested with nightly-20201026-9e9b97f and only "iommu=off" worked, the other 2 didn't work.

tomtefan · October 28, 2020 at 9:42 AM

I tested again, I've had "pci=nomsi" for a long time. I think it was milhouse that suggested that for boot problems with this platform. So I tested removing that and now it boots without the "iommu=off".

libreelec nightly regression on amd 2400g

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