Public bug reported:
Binary package hint: xorg
On two separate Edgy systems, DPMS works as expected at first, but after
disabling and then re-enabling it, the display will not turn off again.
You can trigger this with an app like MPlayer that disables DPMS on
startup and re-enables it at exit, or simply with xset.
Steps to reproduce:
1) Run "xset dpms 5 5 5". Display turns off after 5 seconds without input, as
expected
2) Run "xset -dpms". Display now stays on, as expected.
3) Run "xset +dpms". Display continues to stay on, even after 5 seconds without
input.
To confirm, the relevant xset q output after running xset +dpms is:
DPMS (Energy Star):
Standby: 5 Suspend: 5 Off: 5
DPMS is Enabled
Monitor is On
The only way to get DPMS working again is to re-run the "xset dpms 5 5
5" command.
I've seen this issue on two systems now: one running xorg 7.1.1ubuntu6
with NVIDIA 1.0-9742 drivers, and another running xorg 7.1.1ubuntu6.2
with NVIDIA 1.0-9631 drivers. I've also tested the "nv" driver on one of
the machines, with the same results.
** Affects: xorg (Ubuntu)
Importance: Undecided
Status: Unconfirmed
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Disabling and re-enabling DPMS doesn't work
https://launchpad.net/bugs/78783
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