Public bug reported:
Binary package hint: xserver-xorg-video-vesa
I have an "ATI Technologies Inc RS482 [Radeon Xpress 200]" on-
motherboard display adapter. I have to run it with the VESA driver
rather than the ATI driver, due to various problems with the ATI driver
that prevent it from using resolutions above 640x480 with my monitor.
Under Feisty, DPMS worked fine... the monitor would suspend itself
according to the settings in the GNOME Power Management applet.
Under Gutsy, DPMS does not work. The monitor never suspends itself, and
it fails even when explicitly activating DPMS from the command line:
$ xset dpms force off # nothing happens!
$ xset q
...
DPMS (Energy Star):
Standby: 0 Suspend: 0 Off: 0
DPMS is Enabled
Monitor is On
...
*HOWEVER*, I *can* activate DPMS using vbetool which directly accesses the BIOS:
$ sudo vbetool dpms off # monitor suspends!
$ sudo vebtool dpms on # monitor turns back on!
So I believe this is a problem with the VESA driver. Here are the
relevant portions of my /etc/X11/xorg.conf:
Section "Device"
Identifier "ATI Technologies Inc RS482 [Radeon Xpress 200]"
Driver "vesa"
BusID "PCI:1:5:0"
EndSection
Section "Monitor"
Identifier "DELL P991"
Option "DPMS"
HorizSync 30-107
VertRefresh 48-120
EndSection
Section "Screen"
Identifier "Default Screen"
Device "ATI Technologies Inc RS482 [Radeon Xpress 200]"
Monitor "DELL P991"
DefaultDepth 24
SubSection "Display"
Modes "1600x1200" "1280x1024" "1024x768" "800x600"
"640x480"
EndSubSection
EndSection
Section "ServerLayout"
Identifier "Default Layout"
Screen "Default Screen"
InputDevice "Generic Keyboard"
InputDevice "Configured Mouse"
# Uncomment if you have a wacom tablet
# InputDevice "stylus" "SendCoreEvents"
# InputDevice "cursor" "SendCoreEvents"
# InputDevice "eraser" "SendCoreEvents"
EndSection
** Affects: xserver-xorg-video-vesa (Ubuntu)
Importance: Undecided
Status: New
--
DPMS cannot suspend monitor in Gutsy
https://bugs.launchpad.net/bugs/152999
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