F21 Final RC1 - Xfce screensave not turning off backlight

[Robert Moskowitz]

On 12/01/2014 09:31 PM, Mukundan Ragavan wrote:
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> On 12/01/2014 04:26 PM, Robert Moskowitz wrote:
>> On 12/01/2014 04:01 PM, Robert Moskowitz wrote:
>>> I have gone through the power management and have specified that
>>> after 9 minutes (on AC) to blank the screen and after 10 min (one
>>> more minute) to turn off the screen.  Well it has been over 30
>>> minutes and the screen backlight is still on.
>>>
>>> This is a Lenovo x120e.
>> Even on battery, there is still some backlight.  Less, for sure,
>> but when I turn the room light off, I can still see it.
>>
>> On my other Lenovo x120e with F20 and Gnome, the screen really
>> turns off.
>>
>>
> Unfortunately, I do not see this on my laptop. Has this started
> happening recently?
>
> I have submitted a new update to xfce4-power-manager
>
> https://admin.fedoraproject.org/updates/xfce4-power-manager-1.4.2-1.fc21
>
> Would you be able to give it a try and see if that works?

Just tested screen blanking using the Final RC2 Live workstation that 
boots Gnome.  It is set (on battery) to blank the screen at 5 minutes.  
It did just that.  The screen is off.  Turn off the light in my office 
and the screen is dark, unlike the Xfce install which still has the 
backlight on.

I will be installing the RC2 Xfce via the netinst CD tonight or tomorrow...

I noticed in the booting a message from the kernel:

Dec 02 17:04:12 localhost kernel: thinkpad_acpi: Unsupported brightness 
interface, please contact ibm-acpi-devel at lists.sourceforge.net
Dec 02 17:04:12 localhost kernel: thinkpad_acpi: This ThinkPad has 
standard ACPI backlight brightness control, supported by the ACPI video 
driver
Dec 02 17:04:12 localhost kernel: thinkpad_acpi: Disabling thinkpad-acpi 
brightness events by default...
Dec 02 17:08:21 localhost gnome-session[1593]: Gjs-Message: JS LOG: The 
property brightness doesn't seem to be a normal object property of 
[0x303c920 StWidget] or a registered special property
Dec 02 17:13:00 localhost pkexec[2413]: liveuser: Executing command 
[USER=root] [TTY=unknown] [CWD=/home/liveuser] 
[COMMAND=/usr/libexec/gsd-backlight-helper --set-brightness 4]
Dec 02 17:19:04 localhost pkexec[2427]: liveuser: Executing command 
[USER=root] [TTY=unknown] [CWD=/home/liveuser] 
[COMMAND=/usr/libexec/gsd-backlight-helper --set-brightness 15]
Dec 02 17:19:12 localhost gnome-session[1593]: Gjs-Message: JS LOG: The 
property brightness doesn't seem to be a normal object property of 
[0x4929520 StWidget] or a registered special property

Gnome does seem to know how to turn off the screen.  So I decided to go 
back to the Xfce and check the journalctl from yesterday's testing:

Dec 01 23:02:24 lx120e.htt-consult.com kernel: [Firmware Bug]: ACPI: No 
_BQC method, cannot determine initial brightness
Dec 01 23:02:25 lx120e.htt-consult.com kernel: thinkpad_acpi: 
Unsupported brightness interface, please contact 
ibm-acpi-devel at lists.sourceforge.net
Dec 01 23:02:25 lx120e.htt-consult.com kernel: thinkpad_acpi: This 
ThinkPad has standard ACPI backlight brightness control, supported by 
the ACPI video driver
Dec 01 23:02:25 lx120e.htt-consult.com kernel: thinkpad_acpi: Disabling 
thinkpad-acpi brightness events by default...
Dec 01 23:03:00 lx120e.htt-consult.com kernel: [Firmware Bug]: ACPI: No 
_BQC method, cannot determine initial brightness
Dec 01 23:03:01 lx120e.htt-consult.com kernel: thinkpad_acpi: 
Unsupported brightness interface, please contact 
ibm-acpi-devel at lists.sourceforge.net
Dec 01 23:03:01 lx120e.htt-consult.com kernel: thinkpad_acpi: This 
ThinkPad has standard ACPI backlight brightness control, supported by 
the ACPI video driver
Dec 01 23:03:01 lx120e.htt-consult.com kernel: thinkpad_acpi: Disabling 
thinkpad-acpi brightness events by default...
Dec 01 23:03:53 lx120e.htt-consult.com kernel: [Firmware Bug]: ACPI: No 
_BQC method, cannot determine initial brightness
Dec 01 23:03:54 lx120e.htt-consult.com kernel: thinkpad_acpi: 
Unsupported brightness interface, please contact 
ibm-acpi-devel at lists.sourceforge.net
Dec 01 23:03:54 lx120e.htt-consult.com kernel: thinkpad_acpi: This 
ThinkPad has standard ACPI backlight brightness control, supported by 
the ACPI video driver
Dec 01 23:03:54 lx120e.htt-consult.com kernel: thinkpad_acpi: Disabling 
thinkpad-acpi brightness events by default...
Dec 01 23:04:09 lx120e.htt-consult.com pkexec[1277]: rgm: Executing 
command [USER=root] [TTY=unknown] [CWD=/] 
[COMMAND=/usr/sbin/xfpm-power-backlight-helper --set-brightness-switch 0]
Dec 01 23:23:50 lx120e.htt-consult.com pkexec[1553]: rgm: Executing 
command [USER=root] [TTY=unknown] [CWD=/] 
[COMMAND=/usr/sbin/xfpm-power-backlight-helper --set-brightness 15]

Perhaps this will help.