Gentoo Wiki


This article is still a Stub. You can help Gentoo-Wiki by expanding it.



This could be a start to write a "Howto Gentoo on Samsung P35 1600". Since I do for the most part sucessfully run Gentoo Linux on this machine I will contribute as much as I can. Please be patient. Additions and Corrections are always appreciated.

Samsung P35 XVM II (and III) Hardware Layout

CPU speed is indicated by the exact name of the model. Thus a "P35 XVM III 1720" has a Pentium-M with 1720 MHz.


CPUIntel Pentium-M (Banias for I and Dothan for II, III and IV)
Memory512 or 1024 MB DDR-RAM (usually Samsung PC2700S-25331-Ax DDR)
GraphicsATI Radeon 9700 Mobility with VGA-Out / S-Video-Out
Display1400x1050 SVGA+
HarddriveSamsung 60 GB (XVM II) / 80 GB (XVM III)
Optical-DriveTeac DVD-RW/CD-RW-Combo
SoundcardIntel AC'97 Sound-on-Board
NetworkRealtek 100Base-TX
Wireless-LANIntel Corporation PRO/Wireless 2200BG
Internal ModemIntel AC97 Modem-on-Board
Ports2x USB 2.0, Firewire, Mic, Phones, S-Video, VGA, Ethernet, Modem, parallel and serial

Code: lspci output
0000:00:00.0 Host bridge: Intel Corp. 82855PM Processor to I/O Controller (rev 21)
0000:00:01.0 PCI bridge: Intel Corp. 82855PM Processor to AGP Controller (rev 21)
0000:00:1d.0 USB Controller: Intel Corp. 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #1 (rev 03)
0000:00:1d.1 USB Controller: Intel Corp. 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #2 (rev 03)
0000:00:1d.2 USB Controller: Intel Corp. 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #3 (rev 03)
0000:00:1d.7 USB Controller: Intel Corp. 82801DB/DBM (ICH4/ICH4-M) USB2 EHCI Controller (rev 03)
0000:00:1e.0 PCI bridge: Intel Corp. 82801 Mobile PCI Bridge (rev 83)
0000:00:1f.0 ISA bridge: Intel Corp. 82801DBM (ICH4-M) LPC Interface Bridge (rev 03)
0000:00:1f.1 IDE interface: Intel Corp. 82801DBM (ICH4-M) IDE Controller (rev 03)
0000:00:1f.3 SMBus: Intel Corp. 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) SMBus Controller (rev 03)
0000:00:1f.5 Multimedia audio controller: Intel Corp. 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) AC'97 Audio Controller (rev 03)
0000:00:1f.6 Modem: Intel Corp. 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) AC'97 Modem Controller (rev 03)
0000:01:00.0 VGA compatible controller: ATI Technologies Inc RV350 [Mobility Radeon 9600 M10]
0000:02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10)
0000:02:01.0 CardBus bridge: Ricoh Co Ltd RL5c476 II (rev ac)
0000:02:01.1 CardBus bridge: Ricoh Co Ltd RL5c476 II (rev ac)
0000:02:01.2 FireWire (IEEE 1394): Ricoh Co Ltd R5C552 IEEE 1394 Controller (rev 04)
0000:02:02.0 Network controller: Intel Corp. PRO/Wireless 2200BG (rev 05)

State of Hardware Support under GNU/Linux

All your P35 hardware should be detected correctly. For the SD Cardreader exists a experimental driver, see [1]. There is also an ebuild in portage emerge app-misc/sdricoh_cs

Since Kernel 2.6.20-r7 suspend to ram works out of the box. Just execute echo mem > /sys/power/state.


Boot Media

Get it from here.

Partitions and Filesystem

Do partition your/dev/hda as you like. But remember, if you are going to use suspend to disk by the suspend2-sources as you kernel sources you will need a swap partition at least the size of your RAM.

hdparm settings are:

# hdparm -d1 -X69 -u1 -m16 -c3 /dev/hda


File: make.conf
# You can edit these.
USE="-apm -fortran -mips -sparc -alpha \
     -gnome -kde -dlloader glitz cairo svg dri \
     nptl nptlonly symlink unicode udev \
     sse sse2 mmx ssl userlocales apache2 sasl i8x0 kdexdeltas mozdevelop \
     cdr dvd dvdr acpi opengl pcmcia usb alsa samba xinerama \
     win32codecs video4linux jpeg2k aac h264 \
     bzip2 crypt mysql mysqli sqlite xmlrpc bash-completion"
LINGUAS="de en"

# consult app-portage/mirrorselect
GENTOO_MIRRORS="\ \ \ \ \ \"

# think twice beforde editing these
CFLAGS="-O2 -mtune=pentium-m -pipe -fomit-frame-pointer -fforce-addr -frename-registers -falign-functions=64"

# These are for modular X and need not be changed.
INPUT_DEVICES="keyboard mouse evdev synaptics"
# For official ATI driver
# For Opensource driver uncomment this

# never change this



The radeon 9700 in this notebook is supported by the official ati drivers and the opensource driver from Xorg, both with 3D acceleration. If you decide to use the opensource driver, you can safely choose the radeon framebuffer support in the kernel. (Hint: AIGLX is working with the opensource drivers and with the fglrx driver since ati-drivers-7.11!)

Official Ati driver

First you need to adjust your kernel Options:

Get into menuconfig (cd /usr/src/your-kernel && make menuconfig) and check the following:

Linux Kernel Configuration: menuconfig
Loadable Module Support --->
 [*] Enable loadable module support
   [*]   Module unloading
 [*] Automatic Kernel module loading

Processor type and features  --->
 [*] MTRR (Memory Type Range Register) support

Device Drivers --->
 Character Devices --->
  <*> /dev/agpgart (AGP Support)  # only if you not intend to use FGLRX
    <*> Intel 440LX/BXGX, I8xx and E7x85 chipset support
  [ ] Direct Rendering Manager (XFree86 4.1.0 and higher DRI support)
 Graphics support --->
  [*]  Support for framebuffer devices
  [*]  VESA VGA graphics Support
         VESA Driver type (vesafb-tng) --->
  (1400x1050@60) VESA default mode
       Console Display Driver suport --->
       [*] Framebuffer console support

File Systems --->
 Pseudo Filesystems --->
  [*] Virtual memory file system support (former shm fs)

Do not select any ATI Radeon graphics support in

 Device Drivers --->
   Graphics support --->

as it will prevent your driver from working.

Although everything will work fine, do not select the AGPGART support in kernel as ATI's closed-source driver (aka fglrx) ship already with their own modules. They support things as "agp-locking", what prevents black screens on changing between OpenGL and other graphics modes.

You will need VESA framebuffer and Console Display Driver support to increase your console resolution to 1400x1050. Try to leave VESA Framebuffer support out if the Ati-driver gives you problems.

Recompile and install the kernel then reboot.

Now emerge the ati-drivers.

# emerge ati-drivers ati-drivers-extra

Now you have to run the following command to change from mesa-drivers to ati-drivers:

eselect opengl set ati

Do a

# modprobe fglrx

to verify the creation of the driver. If modprobe goes smoothly all you have to do is edit your xorg.conf to use the new driver.

File: xorg.conf

Section "Device"

    Identifier	"ATI Radeon 9700"
    Driver	"fglrx"

    Option "backingstore" 	"true"
    Option "no_accel"		"no"
    Option "no_dri"		"no"
    Option "mtrr"		"off"

    Option "DesktopSetup"       "Single"
    Option "NoTV"		"no"
    Option "TVStandard"		"PAL-B"
    Option "FSAAEnable" 	"no"
    Option "FSAAScale"		"2"

    Option "UseFastTLS"		"0"
    Option "BlockSignalsOnLock" "on"
    Option "UseInternalAGPGART" "no"
    Option "ForceGenericCPU"	"no"


When you are in your graphical Enviroment you can test your driver using

  1. glxinfo | grep rendering

For some preformance testing use

# glxgears

It gave me ~2200 fps on II for the build-in display.

Don't forget to add fglrx to /etc/modules.autoload.d/kernel-2.6

OpenSource Ati driver

For AIGLX to work you need the opensource ATI driver.

Configure your Kernel first (addapted for Kernel 2.23.x).

Linux Kernel Configuration: menuconfig
Processor type and features  --->
 [*] MTRR (Memory Type Range Register) support

Device Drivers --->
 Character Devices --->
  <*> /dev/agpgart (AGP Support)  # only if you not intend to use FGLRX
    <*> Intel 440LX/BXGX, I8xx and E7x85 chipset support
  [ ] Direct Rendering Manager (XFree86 4.1.0 and higher DRI support)
 Graphics support --->
  [*]  Support for framebuffer devices
  [ ]  VESA VGA graphics Support 
  <*>  ATI Radeon
  [*]    DDC/I2C ATI Radeon support
  [*]    Support for Backlight control
       Console Display Driver suport --->
       [*] Framebuffer console support

File Systems --->
 Pseudo Filesystems --->
  [*] Virtual memory file system support (former shm fs)

DRM will be provided by the latest x11-drm.

emerge x11-drm

Edit your /etc/modules.autoload.d/kernel-2.6 to load your modules.

File: /etc/modules.autoload.d/kernel-2.6

intel-agp agpgart radeon

Note: The radeon module was created by emerging x11-drm

Now you need to switch to your opengl to xorg-x11

# eselect opengl set xorg-x11

Modify your /etc/X11/xorg.conf to use the radeon driver:

File: /etc/X11/xorg.conf
Section "Device"

        Identifier      "ATI Radeon 9700"
        Driver  "radeon"
        BusID   "PCI:1:0:0"

        Option "AGPMode"        "4"
        Option "AccelMethod"    "XAA"
#       Option "AGPFastWrite"   "1"   # Causing my Xorg to HardLock on start
        Option "GARTSize"       "64"
        Option "EnablePageFlip" "1"
        Option "ColorTiling"    "1"
#       Option "ExaNoOffscreenPixmaps"
#       Option "DynamicClocks"  "on"


If you have problems with fonts being too small at 75 DPI, lie about your screen size in xorg.conf.

File: /etc/X11/xorg.conf
Section "Monitor"

        Identifier      "TFT"

        HorizSync 48
        Modeline "1400x1050" 108.00  1400 34208 34320 1688  1050 1052 1055 1063
        Modeline "1024x768" 65.00 1024 1047 1183 1343 768 770 776 805
        DisplaySize 420 315
#       Option "DPMS"   "true"


# xdpyinfo | grep dot

reports :

resolution:    84x84 dots per inch

which is very comfortable.

Get framebuffer console to work with the following setting in grub.conf:

File: /boot/grub/grub.conf
kernel (hd0,0)/kernel-2.6.23 video=radeonfb:1400x1050@60 root=/dev/hda3

Changing Clockrate

Changing clockrate is especially usefull as well for gaming as for mobile operation, or if you intend reducing noise running your P35 from AC.

You will need rovclock: emerge media-video/rovclock

Code: rovclock output
# rovclock -i

Radeon overclock 0.6c by Hasw (

Found ATI card on 01:00, device id: 0x4e50
I/O base address: 0x3000
Video BIOS shadow found @ 0xc0000
Reference clock from BIOS: 27.0 MHz
Memory size: 65536 kB
Memory channels: 1, CD,CH only: 0
XTAL: 27.0 MHz, RefDiv: 6

Core: 195.75 MHz, Mem: 209.25 MHz

Changing the frequency can be done by the options c (core) and m (memory).

Safe minimums are 100 MHz for core and memory:

# rovclock -c 100 -m 100

Maximums as set by ATI without overclocking your card are 200 MHz for core and 200 MHz for memory (on Radeon 9700 64 MB)

# rovclock -c 200 -m 200


I am using rovclock -c 40 -m 60 with the fglrx driver without corruption. Overclocking to Memory: 250 Mhz Clock: 230 Mhz seams to work too.

When using then OpenSource Ati Driver rovclock -c 40 -m 60 generates Corruption. Use rovclock -c 100 -m 100 instead.


In order to use the Synaptics Driver you need to enable Event Interface and PS/2 mouse support in the kernel config.

Linux Kernel Configuration: menuconfig (e.g. 2.6.15-gentoo-r5)
Device Drivers --->
  Input Device support --->
    <*> Event Interface

Device Drivers --->
  Input Device support --->
    [*] Mouse --->
      <*> PS/2 mouse

Emerge the synaptics drivers:

# emerge synaptics

Adjust the xorg.conf accordingly.

File: xorg.conf

Section "InputDevice"

    Identifier	"Touchpad"
    Driver	"synaptics"

    Option	"Protocol"	"auto-dev"
    Option	"Device"	"/dev/input/event1"
    Option 	"FingerLow"	"20"
    Option	"FingerHigh"	"30"

    Option	"LeftEdge"	"1300"
    Option	"RightEdge"	"5700"
    Option	"TopEdge"	"1300"
    Option	"BottomEdge"	"4700"

    Option	"MaxTapTime"	"180"
    Option	"MaxTapMove"	"220"

    Option	"MinSpeed"	"0.06"
    Option	"MaxSpeed"	"0.18"
    Option	"AccelFactor"	"0.0003"
    Option	"SHMConfig"	"on"
    Option	"ZAxisMapping"	"4 5"

    Option	"EdgeMotionSpeed" "40"
    Option	"VertScrollDelta" "100"
    Option	"HorizScrollDelta" "100"
    Option	"UpDownScrolling" "1"



See this guide.



Using "acpid" it is possible to recieve events from all Hotkeys as well as AC Power events. The LCD Brightness and the Backlit (Fn-F5) are hardwired and are working out of the box.

You need ASUS/Medion laptop extras enabled in your kernel, otherwise Hotkey will not generate ACPI events.

Linux Kernel Configuration: menuconfig
Power manegement options (ACPI,APM) --->
  ACPI (Advanced Configuration and Power Interface) Support --->
    [*] ASUS/Medion Laptop extras

Warning: Without ASUS/Medion Extras your WLAN Button won't work!

I am using one central file to manage all events.

Code: /ect/acpi/default
action=/etc/acpi/ %e

Event handler coming soon.


Fixing DSDT

Warning: Don't do this on a P35 XVM III, as it will result in overheating your CPU.
The XVM III comes already with correct DSDT tables.
Your Notebook will automatically shut down if a critical temperature was reached. Additional Note: Some P35 XVM III did not have the fixed DSDT, the fix is still needed.

Fixing the DSDT enables CPU throtteling states on the CPU. In addition to that you can change fan settings to make a more quiet notebook.

More about this Topic

# emerge iasl
# cat /proc/acpi/dsdt > dsdt.dat
# iasl -d dsdt.dat

Edit the dsdt.dsl. Look for this section:

File: dsdt.dsl

    Processor (CPU0, 0x00, 0x00001010, 0x07)

and change it to:

File: dsdt.dsl

    Processor (CPU0, 0x00, 0x00001010, 0x06)

To change fan thresholds look for the following section in your DSDT and edit this values:

File: dsdt.dsl

        Name (FANI, 0x00)
        Name (FAN3, Buffer (0x07)
            0x00, 0x00, 0x00, 0xB8, 0xE5, 0xF6, 0xFF
        Name (FANT, Buffer (0x07)
            0xFF, 0xFF, 0xFF, 0x25, 0x14, 0x09, 0x09
        Name (CMP0, Package (0x02)
            Package (0x02)
                Package (0x0A)

                Package (0x07)

            Package (0x02)
                Package (0x0A)
                    0x2D, <- Fan on Low Speed ( 45 Decimal )
                    0x41, <- Fan on High Speed ( 65 Decimal )
                    0x63, <- Passive Mode ( 99 Decimal )
                    0x69, <- Overheat Shutdown ( 105 Decimal )

                Package (0x07)
                    0x23, <- Fan off Low Speed (35 Decimal
                    0x37, <- Fan off High Speed  ( 55 Decimal )

# iasl -tc dsdt.dsl

You get a dsdt.hex and a DSDT.aml file.

# cp dsdt.hex /usr/src/linux/dsdt.h

Edit your kernel settings to enable Custom DSDT.

Linux Kernel Configuration: menuconfig

Device Drivers --->
  Generic Driver Options --->
    [ ] Select only drivers that don't need compile-time external firmware

Power manegement options (ACPI,APM) --->
  ACPI (Advanced Configuration and Power Interface) Support --->
    [*] Include Custom DSDT

Centrino Speedstep

To undervolt your Centrino LinuxPHC is the weapon of choice.

Patch the Kernel

To patch your kernel:

Code: Patch the kernel
patch -p1 < linux-phc-0.2.9-kernel-vanilla-2.6.19.patch
Configure the Kernel

Linux Kernel Configuration: Set CPUFREQ
-> Power management options (ACPI, APM)
  -> CPU Frequency scaling
    -> CPU Frequency scaling (CPU_FREQ [y]) 
Linux Kernel Configuration: Set CPU
[*] CPU Frequency scaling
[*]   Enable CPUfreq debugging
<*>   CPU frequency translation statistics
[*]     CPU frequency translation statistics details
      Default CPUFreq governor (performance)  --->
---   'performance' governor
<*>   'powersave' governor
<*>   'userspace' governor for userspace frequency scaling
<*>   'ondemand' cpufreq policy governor
<*>   'conservative' cpufreq governor
---   CPUFreq processor drivers
<*>   ACPI Processor P-States driver

Init scripts

to load the voltage change on startup

Coming soon

Userspace utilities

Please see Gentoo Power Management Guide for details on userspace utilities.

These should be a wise choice for most users: sys-power/cpufreqd sys-power/cpufrequtils

A more simple approach is sys-power/powernowd which supports Centrino processors very well out of the box.


IRDA proved to be quite difficult to set up. After consulting various sources,some try and error and a little luck I came to the following solution:

First you need FIR to be enabled in BIOS.

Then edit your Kernel settings

[*] IRComm [M] nsc-ircc

Now emerge the nessesary software:

# emerge -a irda-utils setserial

You need to set options for modprobe. Create

File: /etc/modprobe.d/irda
alias irda0 nsc-ircc
options nsc-ircc dongle_id=0x08
install nsc-ircc /bin/setserial /dev/ttyS1 uart none port 0 irq 0; /sbin/modprobe --ignore-install nsc-ircc

Run update-modules to enable this modifications in /etc/modprobe.conf.

Test your settings with modprobe nsc-ircc. This sould give you no errors.

# rc-update add irda default
# irdadump


Harddrive Spindown is set to 5 minutes by default resulting in spinups and spindowns in worst situations. This can be very anonying while watching movies. It causes the playback to stutter a moment.

You can redefine the spindown timeout utilizing hdparm:

# hdparm -S 254 /dev/hda

Or have hdparm executed during boot:

File: /etc/conf.d/local.start
# set hdd standby times (21 and 10 minutes)
if /usr/bin/on_ac_power; then
   hdparm -S 252 /dev/hda
   hdparm -S 60  /dev/hda

(on_ac_power can be found in sys-power/powermgmt-base)

Card Reader

For the internal card reader, there's a very early driver. It supports SD cards and svn has preliminary MMC support:

Check out the ebuild emerge app-misc/sdricoh_cs

Runtime Environments

External Display

If you occassionally plug in an external display as your primary one, you will soon discover that the ATI utility lets you change the primary display and is even able to shut down your build-in LCD.

In order to have the display switched automatically you can extend this file by:

File: /etc/conf.d/local.start
# determine whether an external display is attached
cp /etc/X11/xorg.conf /etc/X11/xorg.conf.pre-local
if /usr/sbin/ddcprobe | grep -q "analog signal"; then
    echo "External Display attached."
    # set external display as exclusive primary
    cat /etc/X11/xorg.conf.pre-local | sed 's#"Single"#"Single,Reverse"#g' > /etc/X11/xorg.conf
    echo "Using build-in LCD."
    # set build-in LCD as exclusive primary display
    cat /etc/X11/xorg.conf.pre-local | sed 's#"Single,Reverse"#"Single"#g' > /etc/X11/xorg.conf

(ddcprobe belongs to sys-apps/ddcxinfo-knoppix)

You have to set up mirroring in the BIOS for having the console on your external display. Configuration of X11 is not affected by this.

See also

Retrieved from ""

Last modified: Wed, 10 Sep 2008 04:36:00 +0000 Hits: 17,510