Dell Chromebook 11 3189 Disassembly and Reassembly Guide - For use by Certifie - Page 56

Table 15. Advanced help command, Command, Purpose, Optional, Bluetooth Core, modem help

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Table 15. Advanced help command Command Purpose battery_test[] Tests the battery discharge rate for a given number of seconds. No argument defaults to a 300 s test. bt_console [] Enters a Bluetooth debugging console. The Optional argument specifies the capability of a pairing agent the console provides; see the Bluetooth Core specification for valid options. chaps_debug [start|stop|] Sets the chaps debug logging level. No arguments will start verbose logging. connectivity Shows connectivity status. experimental_storage Enables or disables experimental storage features. ff_debug [] [--help] [--list_valid_tags] [--reset] Adds and removes flimflam debugging tags. memory_test Performs extensive memory testing on the available free memory. modem [args...] Interacts with the 3G modem. Run modem help for detailed help. modem_set_carrier carrier-name Configures the modem for the specified carrier. network_diag[--date] [--link] [--show-macs] [--wifi] [--help] [--wifi- Performs a suite of network diagnostics and saves a copy of the mon] output to your download directory network_logging Enables a predefined set of tags useful for debugging the specified device. p2p_update [enable | disable] Enables or disables the peer-to-peer (P2P) sharing of updates over the local network. This will both attempt to get updates from other peers in the network and shares the downloaded updates with them. Run this command without arguments to see the current state. rlz < status | enable | disable> Enables or disables RLZ. rollback Attempts to roll back to the previous update cached on your system. Only available on non-stable channels and non-enterprise enrolled devices. Please note that this will power wash your device. route [-n] [-6] Displays the routing tables. set_apn [-n ] [-u ] [-p ] Sets the APN to use when connecting to the network specified by . If is not specified, use the network-id of the currently registered network. set_apn - c Clears the APN to be used, so that the default APN is used instead. set_arpgw Turns on the extra network state checking to make sure the default gateway is reachable. set_cellular_ppp [-u ] [-p ] Sets the PPP username and/or password for an existing cellular connection. If neither -u nor -p is provided, this shows the existing PPP username for the cellular connection. set_cellular_ppp -c Clears any existing PPP username and PPP password for an existing cellular connection. sound Low level sound configuration. Can be used to play/record audio samples and enable beam forming on Pixel. sound beamforming will enable/disable the feature. sound record [duration] will start recording. sound play plays the recorded audio samples storage_status Reads storage device SMART health status, vendor attributes, and error logs. storage_test_1 Performs a short offline SMART test. 56 Diagnostic and troubleshooting

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Table 15. Advanced help command
Command
Purpose
battery_test
[<test length>]
Tests the battery discharge rate for a given number of seconds. No
argument defaults to a 300 s test.
bt_console
[<agent capability>]
Enters a Bluetooth debugging console. The
Optional
argument
specifies
the capability of a pairing agent the console provides; see
the
Bluetooth Core
specification
for valid options.
chaps_debug
[start|stop|<log_level>]
Sets the chaps debug logging level. No arguments will start verbose
logging.
connectivity
Shows connectivity status.
experimental_storage
<status|enable|disable>
Enables or disables experimental storage features.
ff_debug
[<tag_expr>] [--help] [--list_valid_tags] [--reset]
Adds and removes
flimflam
debugging tags.
memory_test
Performs extensive memory testing on the available free memory.
modem
<command> [args...]
Interacts with the 3G modem. Run
modem help
for detailed help.
modem_set_carrier carrier-name
Configures
the modem for the
specified
carrier.
network_diag
[--date] [--link] [--show-macs]
[--wifi]
[--help]
[--wifi-
mon]
<host>
Performs a suite of network diagnostics and saves a copy of the
output to your download directory
network_logging
<wifi|cellular|ethernet>
Enables a
predefined
set of tags useful for debugging the
specified
device.
p2p_update
[enable | disable]
Enables or disables the peer-to-peer (P2P) sharing of updates over
the local network. This will both attempt to get updates from other
peers in the network and shares the downloaded updates with
them. Run this command without arguments to see the current
state.
rlz
< status | enable | disable>
Enables or disables RLZ.
rollback
Attempts to roll back to the previous update cached on your
system. Only available on non-stable channels and non-enterprise
enrolled devices. Please note that this will power wash your device.
route
[-n] [-6]
Displays the routing tables.
set_apn
[-n <network-id>] [-u <username>] [-p <password>] <apn>
Sets the APN to use when connecting to the network
specified
by
<network-id>. If <network-id> is not
specified,
use the network-id
of the currently registered network.
set_apn - c
Clears the APN to be used, so that the default APN is used instead.
set_arpgw
<true | false>
Turns on the extra network state checking to make sure the default
gateway is reachable.
set_cellular_ppp
[-u <username>] [-p <password>]
Sets the PPP username and/or password for an existing cellular
connection. If neither -u nor -p is provided, this shows the existing
PPP username for the cellular connection.
set_cellular_ppp -c
Clears any existing PPP username and PPP password for an
existing cellular connection.
sound
<command> <argument>
Low level sound
configuration.
Can be used to play/record audio
samples and enable beam forming on Pixel.
sound beamforming
<on|off
>
will enable/disable the feature.
sound record [duration]
will start recording.
sound play
<filename>
plays the recorded audio
samples
storage_status
Reads storage device SMART health status, vendor attributes, and
error logs.
storage_test_1
Performs a short
offline
SMART test.
56
Diagnostic and troubleshooting