BRN-Hardware
Devices' Energy consumption
cpuburn via 'while true; do expr 1 + 1 > /dev/null ; done'
Netgear WGT634U
- idle 7.3W
- cpuburn +0W
- wifi card +0.8-0.9W
Soekris net4826
- idle 4,9W
- cpuburn +2W
- first wifi card +1W
- first and second wifi +1.7W
Devices were powered by a Netgear power supply. The supply's consumption was meassured with ELV Energie Monitor EM 600.
Measuring with Frank's Multimeter G1004.500 directly at the device and an assumed voltage of 16 V.
Soekris net4826
- idle 200mA => 3.2W
- cpuburn +230mA => +3.68W (??)
- first wifi card +50mA => +0.8W
- first and second wifi +100mA => +1.6W
Soekris net4826
Change Serial baudrate
- Enter <Ctrl>+P at BIOS initialization, Enter set ConSpeed=115200 and reboot:
comBIOS ver. 1.28 20050529 Copyright (C) 2000-2005 Soekris Engineering.
net4801
0064 Mbyte Memory CPU Geode 233 Mhz
Pri Mas 64MB ATA Flash Disk LBA 977-4-32 62 Mbyte
Slot Vend Dev ClassRev Cmd Stat CL LT HT Base1 Base2 Int ------------------------------------------------------------------- 0:00:0 1078 0001 06000000 0107 0280 00 00 00 00000000 00000000 0:06:0 100B 0020 02000000 0107 0290 00 3F 00 0000E101 A0000000 10 0:14:0 168C 0013 02000001 0116 0290 08 3C 00 A0010000 00000000 11 0:15:0 168C 0013 02000001 0116 0290 08 3C 00 A0020000 00000000 05 0:18:2 100B 0502 01018001 0005 0280 00 00 00 00000000 00000000 0:19:0 0E11 A0F8 0C031008 0117 0280 08 38 00 A0030000 00000000 09
4 Seconds to automatic boot. Press Ctrl-P for entering Monitor.
comBIOS Monitor. Press ? for help.
> show
ConSpeed = 19200 ConLock = Enabled ConMute = Disabled BIOSentry = Enabled PCIROMS = Enabled PXEBoot = Enabled FLASH = Primary BootDelay = 5 FastBoot = Disabled BootPartition = Disabled BootDrive = 80 81 F0 FF ShowPCI = Enabled Reset = Hard
> set ConSpeed=115200
> reboot
- Log into Linux shell with root/root
- Change Grub config:
pyramid:~# sed -i -e 's/19200/115200/' -e 's#--device=/dev/ttyS0#--unit=0#' /boot/grub/menu.lst
- Change getty config:
pyramid:~# sed -i -e 's/19200/115200/' /etc/inittab