[...]
I rebuild the driver several times recently with and without full
debugging. Nothing is fixed yet, except that I fixed
--enable-debug=full and found
Fatal server error:
[ 461.108] (EE) sna_accel_flush:17413 assertion '!ret ||
priv->gpu_bo == NULL' failed
[...]
Right, so maybe we are not seeing the same issue.
Based on your comment I checked the changes in sna_accel.c between the two builds (20180618 vs. 20200205) and there are actually very few changes, luckily.
One of them makes a call to `sna_accel_flush()` unconditional.
It's a complete shoot in the dark, but who knows... could you try this scratch build as well:
Cheers
Olivier