Hi Mikko,
strange sounds like Nouveau was somehow also using the GEM workaround
for VMWGFX as well.
But -12 means -ENOMEM which doesn't fits into the picture.
I will try with a G710, but if that doesn't yields anything I need some
more input from you.
Thanks for the report,
Christian.
Am 09.06.21 um 15:47 schrieb Mikko Perttunen:
Hi,
I'm observing nouveau not initializing recently on linux-next on my
Tegra186 Jetson TX2 board. Specifically it looks like BO allocation is
failing when initializing the sync subsystem:
[ 21.858149] nouveau 17000000.gpu: DRM: failed to initialise sync
subsystem, -28
I have been bisecting and I have found two patches that affect this.
Firstly, things first break on
d02117f8efaa drm/ttm: remove special handling for non GEM drivers
starting to return error code -12. Then, at
d79025c7f5e3 drm/ttm: always initialize the full ttm_resource v2
the error code changes to the above -28.
If I checkout one commit prior to d79025c7f5e3 and revert
d02117f8efaa, things work again. There are a bunch of other TTM
commits between this and HEAD, so reverting these on top of HEAD
doesn't work. However, I checked that both yesterday's and today's
nexts are also broken.
Thank you,
Mikko
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