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Screen fading out and in.

 
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Old 09-10-2017
Screen fading out and in.
I have two DELL OPTIPLEX 330 x64 PCs with dual core (2.2ghz x2), 2gigs ram. First one is dual boot with Ubuntu on top of Windows XP pro 86. Second one is stand alone Ubuntu.

The CRT monitors on both PCs periodically fade as if they are going into standby mode. But they don't go completely black. This only last several seconds. I have disabled 'TURN OFF SCREEN WHEN INACTIVE', and this happens while I'm typing or moving the mouse. There are no screen savers installed. The first one doesn't do this when I log on to WinXP. The second PC seems to do it more often than the first. This happens with nothing other than a browser loaded.

Also, the second PC runs slow and there seems to be a lot of HDD activity. I don't know if these problems are related. I suspect this is due to pending hardware failure. I'm going to pull the HDD and ram out and put it in a third OPTIPLEX I have on hand and see what happens.

Anyone (WHO HAS EXPERIENCED THIS PROBLEM) have any idea what causes the screens to fade like this? In all my years I have never seen this type of anomaly
Last edited by kkeevv; 09-11-2017 at 01:37 AM..
 
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LEARN ABOUT NETBSD

fujhk

FUJBP(4)						   BSD Kernel Interfaces Manual 						  FUJBP(4)

NAME

     fujbp, fujhk -- Fujitsu Brightness, Pointer, and Hotkeys

SYNOPSIS

     fujbp* at acpi?
     fujhk* at acpi?

DESCRIPTION

     Some Fujitsu laptops come with vendor-specific ACPI devices to manage the laptop hotkeys (such as the 'Eco' button), and to control various
     built-in components (such as the display, the touchpad, and the speakers).  The fujbp and fujhk drivers provide support, through these ACPI
     devices, for hotkeys, backlight on/off switch, brightness level control, and pointer on/off switch.

     The following sysctl(8) read/write variables are provided (when hardware support is available):

	   hw.acpi.fujbp0.brightness  Brightness level (integer).

	   hw.acpi.fujbp0.pointer     Pointer switch state (boolean).

	   hw.acpi.fujhk0.backlight   Backlight switch state (boolean).

     Please note, however, that future versions of the drivers may remove these sysctl(8) variables without prior notice.

SEE ALSO

     acpi(4), acpivga(4), sysctl(8), pmf(9), sysmon_pswitch(9)

HISTORY

     The fujbp and fujhk drivers appeared in NetBSD 6.0.

AUTHORS

     Gregoire Sutre <gsutre@NetBSD.org>

CAVEATS

     Brightness level and backlight switch state should be controlled via wsconsctl(8) instead of sysctl(8).

     The sysctl(8) variable hw.acpi.fujbp0.pointer should be replaced by a platform-independent userland control.

BSD
								 February 20, 2011							       BSD