Package: bugs.debian.org
Severity: normal
Dear Maintainer,
A NEC EA275UHD display is connected using DP cable
to an i3-8100 system. After turning the display
off using DPMS, the screen does not stay off.
It turns on at random intervals, displays a message that there
is no signal on the DP port, and goes back to sleep, repeat the cycle.
"cat /sys/devices/pci0000:00/0000:00:02.0/power/control"
outputs "auto".
echo "on" > /sys/devices/pci0000:00/0000:00:02.0/power/control
eliminates this behavior.
I am using quality DP cables listed in VESA database, 2 meters long, and I tried
several cables from different manufactures.
I observe the same behavior with a different monitor connected
to the same machine.
Thanks.
