HP Z 440 Owners Manual

Clearing and resetting the CMOS 
This section describes the steps necessary to successfully clear and reset the CMOS. The CMOS of the computer stores password information and information about the computer 
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Using Computer Setup (F10) Utility to reset CMOS
1.Access Computer Setup (F10) Utility menu.
2.When Computer Setup message appears in the lower-right corner of the screen, press F10, and then 
press 
Enter to bypass the title screen, if necessary.
If you do not press F10 while the message is displayed, the computer must be rebooted to access this 
utility.
3.From Computer Setup (F10) Utility menu, select Main > Replicated Setup > Restore current settings 
from USB device
.
This restores the settings that...

ALinux technical notes
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reason is that the graphics card (default) is selected for audio output instead of the DisplayPort. Check the 
audio settings (for example, 
Sound in gnome-control-center).
In some systems, embedded Intel HD graphics may also present a similar HDMI audio device that can be used  through the DisplayPort interface. No proprietary driver is needed for this device, just a 
su

To customize display characteristics and resolutions when the computer is using an NVIDIA driver, execute the 
following command:
/usr/bin/nvidia-settings
To create and manipulate the /etc/X11/xorg.conf 

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