Transcript Chapter 9: Troubleshooting Power Management and I/O Devices

Chapter 9: Troubleshooting Power
Management and I/O Devices
MCDST 70-271: Supporting Users and Troubleshooting a
Microsoft Windows XP Operating System
Objectives
• Understand and troubleshoot power
management
• Understand and troubleshoot I/O devices
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Power Management
• Advanced Configuration and Power Interface
(ACPI)
– Extends battery life by powering down unused
devices
– Can control the system using soft power switches
– Makes PC cards able to be hot-swapped and
notebooks to be hot-docked
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Power Management (continued)
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Power Options
• Applet is used to set system’s power-saving and
battery management features
• Typical tabs found in dialog box
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Power Schemes
Alarms (notebook only)
Power Meter (notebook only)
Advanced
Hibernate
UPS
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Power Options (continued)
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Power Options (continued)
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Power Options (continued)
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Standby Versus Hibernate
• Standby
– Mode in which system goes into a lower power
consumption mode
– System can quickly return from Standby mode to
fully operational mode in a few seconds
• Hibernation mode
– State of system is saved to temporary data file on
hard drive and computer is fully powered off
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Troubleshooting Power
Management Issues
• ACPI-related problems
– The system will not shut down
– Standby and Hibernate modes are not available
– Devices malfunction after restoring from standby
or hibernation
– The system is unable to resume from standby or
hibernation
– The monitor will not power back on after being
powered off by ACPI
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Troubleshooting Power
Management Issues (continued)
• To troubleshoot ACPI problems:
– Verify that computer hardware supports ACPI
– Verify that ACPI is enabled via the computer’s
BIOS
– If necessary, enable ACPI through the computer’s
BIOS
– If necessary, update the BIOS on the computer
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Troubleshooting Power
Management Issues (continued)
• To troubleshoot ACPI problems (continued):
– Verify that all device drivers are updated
– Verify that latest service pack for Windows XP is
installed
– Verify that you are not using the generic VGA
driver
– If all other troubleshooting steps fail, attempt an
upgrade or clean/new installation of Windows XP
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Managing I/O Devices
• I/O device
– Any device that is used to send input into the
computer or produce output from the computer
– Can be connected to a computer through
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Serial, parallel
USB
IEEE 1394 (Firewire)
IR/IrDA (infrared)
RF/WiFi/wireless
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Installing Device Drivers via Add
Hardware
• Add Hardware applet
– Used to install DVD players, CD players, tape
devices, scanners, modems
– Once a device is installed it can be configured and
managed through Device Manager
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The System Applet Tabs
• General tab
– Displays operating system version, service pack
level, registered username
• Computer Name tab
– Used to join a domain/workgroup and change the
computer name
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The System Applet Tabs
(continued)
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The System Applet Tabs
(continued)
• Hardware tab
– Used to access the Add Hardware applet, enable
and disable driver signing requirements
• Advanced tab
– Used to access controls for Performance settings
• System restore tab
– Controls the amount of disk space to use for
system restoration
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The System Applet Tabs
(continued)
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The System Applet Tabs
(continued)
• Automatic Updates Tab
– Manages how Windows Update downloadable
packages are handled
• Remote tab
– Enables, disables, and configures Remote
Assistance and Remote Desktop
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The System Applet Tabs
(continued)
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The System Applet Tabs
(continued)
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The System Applet
Configuration Options
• Driver signing
– Identifies drivers that have passed Microsoft
Windows Hardware Quality Lab evaluation and
tests
• Options presented by Driver Signing Options
dialog box
– Ignore
– Warn
– Block
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Device Manager
• Used to verify that a device is working properly
• Lists all installed and known devices and
indicates their status
• Yellow exclamation point or a stop sign over a
device’s icon indicates problems or conflicts
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Device Manager (continued)
• A device’s Properties dialog box will have at least
two standard tabs:
– General: access type, manufacturer, and location
settings
– Driver: change driver settings or install or upgrade
device-related drivers
• Resources tab displays device’s resource
settings
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Device Manager (continued)
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Device Manager (continued)
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Device Manager (continued)
• Four main areas of hardware resource conflict
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IRQ
I/O port
DMA (Direct Memory Access)
Memory
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Hardware Profiles
• A collection of custom settings specific to a
particular situation
• Most often used on portable computers for which
hardware configurations change often
• Can be employed whenever there will be a
hardware change between bootups
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Troubleshooting I/O Devices
• Problem/solution combos that may assist in
resolving problems
– Out-of-date BIOS or firmware
• Update using tools from the vendor’s Web site
– Damaged connection cable
• Replace the cable
– Incorrect connection cable
• Use the correct cable
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Troubleshooting I/O Devices
(continued)
• Problem/solution combos that may assist in
resolving problems
– Wrong hub type
• Use the correct hub for the device connection type
– Hub does not provide enough in-line power
• Disconnect other devices or add direct power to
device
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Summary
• Windows XP supports both ACPI and APM
standards
• Power management must be an enabled feature
of the installed hardware in order to function
• Power Options applet is used to manage power
issues
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Summary (continued)
• Troubleshooting ACPI issues involves verifying
that device drivers are updated and the ACPI
features of devices are turned
• Windows XP supports a broad range of I/O
devices
• Proper driver management is a key issue in
troubleshooting devices
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