DRM errors when both LCD and HDMI connected

Products Support DragonBoard 820c
#1

Hi,

I have both LCD and HDMI connected to board, both displays are off after 15 mins(In power management settings selected turnoff monitors in idle state) facing the below error if i try to exit from idle state(using mouse movement or key press).

kernel- 4.14.96
build-Debian

Any idea on this?

@vinaysimha
@architt
@danielt
@Loic
@doitright

Thanks,
Arun

#2

Is it reproducible with latest release?

#3

@Loic
I have tried with snapshot number 382(kernel-4.14.96), is there any fixes merged recently related to this issue?

Thanks,
Arun

#4

I don’t know but it is worth a try since latest release is based on kernel 5.4

#5

Its on 5.7 now, actually.
http://snapshots.linaro.org/96boards/dragonboard820c/linaro/debian/latest/

#7

issue is seen because of deadlock(-EDEADLK)