Package: libdrm-tests
Version: 2.4.103-2
Using Debian Sid 64bit, kernel 5.9.6, i915 driver.. Tried using both
modetest and proptest to disable DPMS. Neither reported a problem but
the DPMS value remained unchanged.
$ modetest -c
trying to open device 'i915'...done
Connectors:
id encoder status name size (mm) modes encoders
143 142 connected HDMI-A-1 1600x900
46 142
modes:
index name refresh (Hz) hdisp hss hse htot vdisp vss vse vtot)
#0 3840x2160 60.00 3840 4016 4104 4400 2160 2168 2178 2250 594000
flags: phsync, pvsync; type: preferred, driver
#1 4096x2160 60.00 4096 4184 4272 4400 2160 2168 2178 2250 594000
flags: phsync, pvsync; type: driver
.............trimmed for size
2 DPMS:
flags: enum
enums: On=0 Standby=1 Suspend=2 Off=3
value: 0
.............trimmed for size
$ modetest -w 143:DPMS:3
trying to open device 'i915'...done
Doing a `modetest -c` here gives identical results to the above.. Also:
$ cat /sys/class/drm/card0/card0-HDMI-A-1/dpms
On
Replacing modetest with proptest also gives identical results as above, with:
$ proptest 143 connector 2 3
trying to open device 'i915'...done
