Dell Inspiron 640m / E1405

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Dell Inspiron 640m / E1405

[edit] Hardware

14,1 inch display @ 1440x900
Intel Core 2 Duo and Core Duo processors
Intel 945GM chipset (ICH7-M)
Up to 2 GB RAM  	
Intel GMA 950
Synaptics touchpad
hard drive
DVD+/-RW optical drive
Broadcom BCM4401-B0 Fast Ethernet
Intel PRO/Wireless 3945ABG or Dell Wireless 1390 wifi
Dell Wireless 355 bluetooth
Conexant D110 modem
Intel High Definition Audio with built-in microphone
USB 2.0
ExpressCard slot
Ricoh Firewire controller
Ricoh R5C822 SD/SDIO/MMC/MS/MSPro adapter
Ricoh R5C592 Memory Stick adapter
Ricoh xD-Picture Card controller

[edit] Hardware Status Overview

	Device	Working	Driver	Troubleshooting
Processor	Processor
Drives and Storage	Hard Drive		ahci
	Optical Drive		ata_piix
	SD and MMC card readers	unknown	sdhci
	Memory Stick reader
	xD card reader
USB	USB		uhci, ehci
Graphics	Intel		i915, intel
Input Devices	Keyboard		keyboard
	Touchpad		synaptics
	Functions Keys
Networking	Ethernet		b44
	WLAN: Intel		iwlwifi
	WLAN: Dell		b43, ndiswrapper
	Modem	unknown	hsfmodem
	Bluetooth		hci_usb	See below
Sound	Sound		snd_intel_hda	See below
Other	PC Card	unknown	yenta_socket
	Hardware Sensors	unknown	i8k
	Suspend to RAM	unknown
	Suspend to Disk	unknown

[edit] Dell Laptop guides

Dell specific laptop guides:

• Dell Function Keys
• Dell Hardware Sensors
• Dell BIOS Upgrade
• Dell Utility / System Restore / MediaDirect
• Dell Docking Station

[edit] Generic Laptop guides

Some generic laptop guides:

• ACPI
• Power Management

[edit] Troubleshooting

[edit] USB

The internal USB hub causes some problems if it runs in compatible mode (USB1.1). Just switch the device to USB2.0 using the system bios. The difference of the battery life time is between 5 and 10 minutes using the 9 cell battery.

[edit] Sound

To turn on the microphone, you have to:

• If you build the Intel HD Audio driver into the kernel, append snd-hda-intel.model=ref to the kernel line of your boot manger config, e.g. /boot/grub/grub.conf:

 kernel other_kernel_options snd-hda-intel.model=ref
 

• If you build the Intel HD Audio driver as modules, add the following to /etc/modprobe.d/snd_hda_intel:

 options snd_hda_intel model=ref
 

Afterwards run update-modules.

To activate the microphone you have to enable all Capture and Mux channels (left and right) and also set Input Source to Front Mic.

[edit] Bluetooth

I have some kernel messages about hci_usb_isoc_rx_submit: hci0 isoc rx submit failed urb df9a7c14 err -38. You can fix this by disabling isoc (Set isochronous transfers for SCO over HCI support):

• If you build the bluetooth HCI USB driver driver into the kernel, append hci_usb.isoc=0 to the kernel line of your boot manger config, e.g. /boot/grub/grub.conf:

 kernel other_kernel_options hci_usb.isoc=0
 

• If you build the bluetooth HCI USB driver driver as modules, add the following to /etc/modprobe.d/bluetooth:

 options hci_usb isoc=0
 

Afterwards run update-modules.

[edit] Clock

Change /etc/conf.d/clock:

 CLOCK_OPTS="--directisa"