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HP EliteBook 8460p

Introduction

This is a compatibility guide to running Linux with the HP EliteBook 8460p laptop.

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Specifications

NameHP EliteBook 8460p
ProcessorIntel Core i7-2820QM Processor (2.30 GHz, 8 MB L3 cache, 4 cores/8 threads, 45W)
Intel Core i7-2720QM Processor (2.20 GHz, 6 MB L3 cache, 4 cores/8 threads, 45W)
Intel Core i7-2630QM Processor (2.00 GHz, 6 MB L3 cache, 4 cores/8 threads, 45W)
Intel Core i7-2620M Processor (2.70 GHz, 4 MB L3 cache, 2 cores/4 threads, 35W)
Intel Core i5-2540M Processor (2.60 GHz, 3 MB L3 cache, 2 cores/4 threads, 35W)
Intel Core i5-2520M Processor (2.50 GHz, 3 MB L3 cache, 2 cores/4 threads, 35W)
Intel Core i5-2410M Processor (2.30 GHz, 3 MB L3 cache, 2 cores/4 threads, 35W)
Intel Core i3-2310M Processor (2.10 GHz, 3 MB L3 cache, 2 cores/4 threads, 35W)
Screen14“ (1366×768) Widescreen
14” (1600×900) Widescreen
RAMUp to 16GB
HDDUp to 750GB
Optical DriveBlu-ray R/RE DVD+/-RW SuperMulti DL Drive
Blu-ray ROM DVD+/-RW SuperMulti DL Drive
DVD+/-RW SuperMulti DL Drive
DVD-ROM Drive
GraphicsAMD Radeon HD 6470M
Intel HD Graphics 3000
SoundIntel Corporation 6 Series Chipset Family High Definition Audio Controller
EthernetIntel 82579LM Gigabit Network Connection
WirelessIntel Centrino Ultimate-N 6300 (3×3)
Intel Centrino Advanced-N 6205 (2×2)
Atheros HB112AGN 802.11a/b/g/n (3×3) WiFi Adapter
Broadcom 43224AGN 802.11a/b/g/n WiFi Adapter
Broadcom 4313GN 802.11b/g/n WiFi Adapter
BluetoothHP Integrated Module with Bluetooth 2.1+EDR Wireless Technology
ModemHP hs2340 HSPA+ Mobile Broadband Module
HP un2430 EV-DO/HSPA Mobile Broadband Module
USBIntel Corporation 6 Series Chipset Family USB Enhanced Host Controller
NEC Corporation uPD720200 USB 3.0 Host Controller
FirewireJMicron Technology Corp. IEEE 1394 Host Controller
Card ReaderJMicron Technology Corp. SD/MMC Host Controller
Fingerprint ReaderHP Fingerprint Sensor with chip DigitalPersona VFS471
WebcamHP HD Webcam with chip Chicony Electronics SN0001
KeyboardCompatible PC 101/102 keyboard with additional buttons: wireless on/off, HP QuickWeb, volume mute
TouchpadSynPS/2 Synaptics TouchPad
AccelerometerST LIS3LV02DL Accelerometer
TrackpointUnknown
Ambient Light SensorUnknown

Linux Compatibility

DeviceCompatibilityComments
ProcessorYes
ScreenYes
RAMYes
HDDYes
Optical DriveYes
GraphicsYesAMD Radeon HD 6470M works with open source driver radeon (see notes below)
SoundYes
EthernetYes
WirelessYesIntel Centrino Advanced-N 620 works in Master AP mode too with hostapd
BluetoothYes
ModemNot Tested
USBYesWorking USB 2.0 and USB 3.0 too
FirewireNot Tested
Card ReaderYes - SD
ExpressCard SlotNot Tested
Fingerprint ReaderNoFprint project does not support this fingerprint reader
WebcamYes
KeyboardYesAdditional buttons works too (see notes below)
Brightness buttons need patch (see notes below)
TouchpadYes
AccelerometerYes
TrackpointYes
Ambient Light SensorYesWorks with kernel module hp-wmi (included in Ubuntu 11.04 natty)
SuspendYesProblem with brightness (see notes below)
HibernateYesNeed updating kernel & graphics drivers (see notes below)
External VGAYes

Notes

All tests was done on clean installation of Linux distribution Ubuntu 11.04 natty (without external repositories/programs).

Ambient Light Sensor

Enable:

echo 1 > /sys/devices/platform/hp-wmi/als

Disable:

echo 0 > /sys/devices/platform/hp-wmi/als

Wireless button

Wireless button is controled by HW, so no driver is needed. For handling events generated by this button (e.g when press show info on screen), is needed proper maping to KEY_WLAN (238) in kernel (default is for unknow key):

setkeycodes e078 238

Ambient button

Fn+F11 (Ambient button) is badly mapped in kernel to KEY_TOUCHPAD_OFF (193). For remaping to KEY_PROG1 (148) which can be configured in Gnome/KDE for enabling/disabling sensor with commands above:

setkeycodes e033 148

Brightness buttons

For controlling brightness on notebook with Radeon card is needed these kernel patches:
http://lists.freedesktop.org/archives/dri-devel/2012-July/025535.html
On notebooks with Intel card there are no problems.

If brightness keys on radeon notebook with above patches not working, change brightness with this command (N=1..254):

echo N > /sys/class/backlight/radeon_bl/brightness

Accelerometer

In linux kernel is recognized as joystick device with 3 axes and 0 buttons. Tested with KDE4 systemsettings joystick configuration. Application can read state throw file /dev/input/js0

Temperature sensors

Reading temperature can be done throw sysfs (in thousends degress of Celsius):

head /sys/class/hwmon/hwmon*/temp*_input

Or program sensors from package lm-sensors:

sensors

On graphics card AMD Radeon HD 6470M

Autodetected with open source driver radeon. Nothing more steps needed.

On processor

Need manualy load kernel module coretemp:

modprobe coretemp

Graphic card AMD Radeon HD 6470M

With open source driver radeon DRM/KMS/Mesa/Gallium works fine. Tested (all working):

  • Wide screen resolution 1600×900 in text mode
  • Wide screen resolution 1600×900 in Xserver
  • DRM framebuffer device with resolution 1600×900
  • OpenGL 2.1 (new version is not implemented in Mesa/Gallium)
  • Xv (for playing video)
  • Temperature sensor
  • Power profiles

Switching power profiles

Default:

echo profile > /sys/class/drm/card0/device/power_method
echo default > /sys/class/drm/card0/device/power_profile

Low:

echo profile > /sys/class/drm/card0/device/power_method
echo low > /sys/class/drm/card0/device/power_profile

Medium:

echo profile > /sys/class/drm/card0/device/power_method
echo mid > /sys/class/drm/card0/device/power_profile

High:

echo profile > /sys/class/drm/card0/device/power_method
echo high > /sys/class/drm/card0/device/power_profile

Dynamic:

echo dynpm > /sys/class/drm/card0/device/power_method

All features (implemented/unimplemented) in open source driver radeon on (column N.Islands) http://www.x.org/wiki/RadeonFeature

Suspend

Working fine, but after resume display brightness is on 100%. To change brightness on notebook with Raden card see Brightness section.

Hibernate

There is bug in DRM part of open source kernel radeon driver. When Xserver is started it is not possible to resume laptop from hibernate. Hibernate in text mode (without started Xserver) working fine.

This bug is fully fixed in Linux kernel 3.1, mesa 7.12.0 and xorg radeon driver 6.14.99. Packages for Ubuntu Oneiric are in xorg-edgers ppa:
https://launchpad.net/~xorg-edgers/+archive/ppa

(U)EFI Booting

Notebook firmware support both BIOS and (U)EFI booting, but with bugs (detected on my notebook):

  • Firmware boot in BIOS mode from MBR if exists at least one primary partition has boot/active flag
  • Firmware recognize GPT partitions (e.g. ESP) only if exists at least one primary parition without boot/active flag
  • HP QuickWeb cannot be loaded from GPT parition, so HP_TOOLS paritions must be BIOS/MBR or hybrid GPT
  • HP_RECOVERY partition must be NTFS and must be also BIOS/MBR or hybrid GPT
  • Configuring menu enitries in efibootmgr does not working. Firmware overwrite at every startup bootorder. Only bootnext is working. Also does not show any of menu entires in F9 bootmenu.
  • Default EFI boot manager (in boot menu also know as “OS Boot Manager”) is loaded from file EFI/Microsoft/BOOT/bootmgfw.efi
  • Firmware does not support framebuffer (U)EFI GOP output with higher resolution then 1024×768
  • Firmware (sometimes) does not initialize (U)EFI console output at full screen (only small rectangle)
  • When BIOS VESA framebuffer output is activated (e.g in Grub2) it is not possible to switch back to BIOS VGA output (so booted kernel must activate KMS driver with framebuffer for console output)

Usefull partition configuration: working (U)EFI and BIOS mode, all with GPT paritions.

GPT:
  * partition for grub (booting in BIOS mode - 2MB), bios_grub EF02 GPT flag
  * HP_RECOVERY partition NTFS
  * HP_TOOLS partition FAT32, also used as ESP (EFI System Partition), esp EF00 GPT flag
Hybrid GPT (as MBR):
  1. protective GPT
  2. mapped HP_RECOVERY - with boot/active flag
  3. mapped HP_TOOLS
  4. protective GPT

These Hybrid GPT partitions fix problems with HP QuickWeb, HP Recovery, (U)EFI booting (needs one WITHOUT bootflag) and BIOS booting (needs one WITH bootflag).

Boot order (if (U)EFI is enabled):
1. boot from ESP (U)EFI file: EFI/BOOT/BOOTX64.EFI
2. boot from ESP (U)EFI file: EFI/Microsoft/BOOT/bootmgfw.efi
3. check if web button was pressed and if yes start HP QuickWeb
4. boot from ESP (U)EFI file: EFI/BOOT/BOOTX64.EFI
5. boot from ESP (U)EFI file: EFI/Microsoft/BOOT/bootmgfw.efi
6. boot in BIOS mode from HDD MBR (if MBR contains at least one partition with active/boot flag)

If (U)EFI mode is enabled it is still possible to boot in BIOS mode, but it is needed to quit loaded EFI bootloader. Grub2 has command exit, which quit itself and then firmware continue booting. (So you need quit grub2 4 times to be able to boot in BIOS mode)

HP_RECOVERY

Firmware can boot from this partition in BIOS mode when key F11 at boot is pressed. This partition must be BIOS/MBR type (or hybrid GPT), must be NTFS and must contains bootloader in partition header. Also must has label HP_RECOVERY. This partition contains Windows installation, but can be replaced by some recovery Linux distribution. It needs proper bootloader, so grub2 can be installed on this partition:

$ sudo grub-install --boot-directory=/mnt/sda<NUM> --force /dev/sda<NUM> (where NUM is partition number)

HP_TOOLS

This parition must be FAT32 with label HP_TOOLS and contains some default preinstalled HP (U)EFI applications (as System Informations, BIOS update utility, …) and preinstalled Linux distribution HP QuickWeb. All HP (U)EFI applications works if paritition is GPT type, only QuickWeb has problem. So this partition should be BIOS/MBR type or hybrid GPT. HP QuickWeb can be booted with Grub2, see http://phoronix.com/forums/showthread.php?63666-Booting-HP-QuickWeb-(v3)-with-Grub2

Because this partition contains some HP (U)EFI application and is FAT32 it can be used as ESP (EFI System Partition) where must be located all (U)EFI bootloaders. ESP has GPT flag EF00.

Summary

This laptop works fine with Ubuntu 11.04 natty without any additional drivers. The only problem is brightness and for some people maybe lack of driver for Fingerprint reader.


Discussion

Pali, 2012/07/28 14:51

Hello,
Alex Deucher now written patches for radeon kernel driver, which enable changing brightness on Radeon cards. I tested it and it really working on our 6470M card. Patches are here: http://lists.freedesktop.org/archives/dri-devel/2012-July/025535.html

For changing brightness use (N=1..254):
$ echo N > /sys/class/backlight/radeon_bl/brightness

morlix, 2012/05/07 17:21

I have a 8760w with ATI 6700M and kubuntu 12.04. I can press the mute button and a popup show that sound is muted, but it isn't. Does anybody know how to fix this?

morlix, 2012/05/10 07:39

the solution is to change the main channel to the internal audio channel and not use the default selected hdmi audio channel.

subhan, 2012/04/20 14:44

Optical drive is not working under Linux for me.

OpenSUSE 11.3

during installation of 11.3
- i booted from drive using 11.3 DVD
- just before it display installation config (way before it started installation, i.e. first screen where it asks for language, even before that dialog), it prompted that please insert the dvd to carry out installation.
- i connected external dvd drive and installed 11.3 but still it does not do anything when i put cd/dvds in it.

anyone ?

Luis, 2012/01/22 20:15

My HP EliteBook 8460p has not a Rademon graphic card, it looks to have an Intel but I dont know the exact model (perhaps Intel HD 3000).

Any of you has this model? I'm running Debian+xfce4+xserver-xorg-video-intel

Daniel, 2011/12/28 19:46

maybe the fingerprint driver is variable in April 2012

https://bugs.launchpad.net/ubuntu/+source/libfprint/+bug/744310

Pali, 2012/01/17 19:03

Tested, but that patch does not work on my Elitebook 8460p. That patch is for vfs30x, but our Elitebook has vfs471.

Martin, 2011/12/26 17:52

Hello guys,

got this laptop and wanted to give it a try to run linux on it after several years of linux-abstence on notebook/desktop. Currently running latest Mint Debian with XFCE, custom 3.1.6 kernel (tried distro's 3.0.0 as well as 2.6.39)

- fan control ⇒ all cpu cores are adapting it's speed according to usage (mostly 800Mhz then) however I'm unable to get fan to more silent speed (I'm not sure if it's CPU or GPU speed that's causing problems however CPU's are between 42-53 degrees, and GPU around 52-55 degrees at idle state)

- backlight control ⇒ so far no working, at least the brightness is at usable level after ALS is enabled..

- broken 802.11n ⇒ I had to disable 'n' in order to get stable/working WLAN connection

All that results that notebook is mostly unusable when running on batteries, got 1:30 - 2:00 running time there whereas it can get 4.5/5+ on W7..

Anyway I'd be glad for any comments/suggestions regarding points above if you have some.. Or maybe also some other hints.. :)

Martin, 2011/12/28 19:19

Fine, tried latest fglrx with 3.1.6 and the backlight works now OK (even after sleep) - I should have read more carefully.. so I will stick to fglrx, so far it works well.. and I can get additional :45 - 1 hour of battery run..

However the fan speed is still slightly noisy and eats CPU..

Daniel, 2011/12/24 21:51

The smartcard reader is a Alcor Micro AU9540.
http://pcsclite.alioth.debian.org/ccid/supported.html#0x058F0x9540

acsccid is necessary to work with pcsc.

https://aur.archlinux.org/packages.php?ID=49246

bz31, 2011/11/26 14:33

radeon vs fglrx: You should use the proprietary fglrx driver

Yes. The free radeon driver works well. But I can not keep it for the following reason.

I'm running debian unstable. With gkrellm, I can see eight temperature indicators. They show, in normal office use
- with radeon, the temperatures are between 50 °C ~ 65 °C
- with fglrx, 35 °C ~ 48 °C.

I think the fan speed increases significantly when > 50 °C, and the noise gets really heavy.

There are 10 °C ~ 15 °C difference between the two pilots. I do not know if there are better options for radeon to change this.

For me, I am forced to use fglrx.

I hope this information can help you.

MadTee, 2011/11/21 18:04

First i'd the above prob but now it works fine with actual BIOS and open-source Radeon driver. Best regards MadTee.

Daniel, 2011/11/09 23:34

Have somebody hints about UEFI on this laptop ?

When I'm change with efibootmgr boot order, it doesnt't work but bootnext is working :)

Tested with BIOS revision: 68SCF Ver. F08.

Bug confirmed !?

Whats mean this sentence:

“Firmware recognize GPT partitions (e.g. ESP) only if exists at least one primary parition without boot/active flag” please explain..

I also can boot with F9 - Select EFI File /EFI/grub/grub.efi or start the efi_shell.

In my system (Archlinux) the GPT EFI partion (EF00) is mounted on /boot/efi

Path to grub.efi is /boot/efi/efi/grub/grub.efi

(my EFI partion is on a USB Stick, Harddisk has its own /boot partion also GPT)

BOOT ORDER PATH

cp /boot/efi/efi/grub/grub.efi /boot/efi/efi/Microsoft/BOOT/bootmgfw.efi

But the default 'OS Boot Manager' don't start..

I want to start without any entry. :(

I tried various paths but nothing work automatically. (only F9 + File select)

I don't care about the HP stuff I only want to boot my own efi grub file…

Any Idea ?

Pali, 2011/11/14 21:24

efibootmgr is not working. It is really bug :(

“Firmware recognize GPT partitions (e.g. ESP) only if exists at least one primary parition without boot/active flag”

You must have at least one BIOS/MBR partition without boot flag (boot flag is sometimes called active). You can use fdisk utility for setting MBR boot flag. If you are using GPT you can see that you have one large MBR parition with EF02 code.

If “Select EFI File” working and you see your ESP parition, then you do not have above problem with MBR boot flag.

How you can start efi_shell?

I think that “OS Boot Manager” try to boot from HDD, not USB. Maybe you can try to create ESP GPT partition on your HDD.

Also try copy grub.efi file to EFI/BOOT/BOOTX64.EFI, maybe it will works. (On my Elitebook this file is loaded too) Also check BIOS settings if UEFI booting and USB booting is enabled. (It show me warning that EFI booting is not supported :) )

I want to start without any entry.

Default boot order can be configured in BIOS. First order is UEFI (if enabled) and second legacy BIOS/MBR. So you can configure “OS Boot Manager” as first option.

I have grub2 on these locations and UEFI booting working fine:
/boot/efi/EFI/Microsoft/BOOT/bootmgfw.efi
/boot/efi/EFI/BOOT/BOOTX64.EFI
/boot/efi/EFI/grub/grub.efi

/boot/efi is mounted as HP_TOOLS (FAT32, GPT, marked as EF00)
HP_TOOLS is also hybrid GPT - MBR (without boot flag with Id c)
grub is installed to /boot/efi/EFI/grub/

Gergely, 2011/11/08 09:37

Hi Nate and Pali,

I also have issues with the brightness control. I upgraded to the latest F20 BIOS + tried kernel with and without acpi_osi=Linux.

pcie_aspm=force option is set on the kernel command line.

I have a question to both of you: Do you have the high resolution panel (1600×900) or the low resolution panel (1366×768)?

I have the high resolution panel. If Nate would have a low res panel, then we might have a clue what is causing the different behavior.

Also for Nate: Are you using the open-source Radeon driver, or the closed-source FGRLX driver?

Best Regards,
Gergely

Nate, 2011/11/08 12:55

Im afraid Im not gonna be much more help here because shortly after the last post the screen went wonky and the motherboard failed. I sent it in and have been waiting on its return now for 2 weeks. Mine was the Intel graphics btw.

Nate, 2011/12/16 23:29

I got the machine back from HP and installed Mint 12 on it. The brightness function keys didn't work right away (no change in brightness or OSD pop up), but after I tried:

echo 0 > /sys/class/backlight/acpi_video0/brightness (this worked to set brightness to 0)

Suddenly the function keys for brightness worked!
Mint is quite nice - I'm still checking to see whats working / not, so far so good.

Pali, 2011/11/08 22:30

I have panel with resolution 1600×900 and with radeon card. I'm using open source radeon driver (as I described in details) - but this should be irrelevant for display brightness (it should be handled - I belive ! - by ACPI or other part of HW).

I also tried different acpi_* kernel commands and also pcie_aspm=force. All without effect

But now I have some news:
In QuickWeb brightness keys are working. Next, I hacked HP QuickWeb - I added xterm binary into QuickWeb and xterm is started after QuickWeb is booted. When I tried to change brightness via ACPI sysfs (/sys/class/backlight/acpi_video0/brightness) it worked!

So I really does not understand why in QuickWeb is ACPI handling working… Maybe HP patched linux kernel and they “brightness” problem… but we do not have source code of QuickWeb.

I asked HP for Linux kernel source code which is used in HP QuickWeb v3 for EliteBook 8460p but HP did not released it…

At least this ISPROBLEM in HW. Standard ACPI call for controlling brightness must work (in Linux can be adjusted by sysfs/procfs). And if not working there is bug in ACPI - so it is BIOS/HW bug!

Gergely, 2011/11/09 08:58

Hi Pali,

I tested with the fglrx drivers, and there the brightness settings works fine. Probably they use that in QuickWeb. Of course fglrx still messes up the text consoles + I had to disable splash screen so I can enter the disk encryption password at boot…

So I am pretty disappointed with how Linux performs on this machine (2 hrs battery life instead of 4, fans spinning like mad even after I applied all the power profile hacks I could find…

After 14 years with Linux I have to run Windows as my primary OS. I am still running Linux in VMs because we develop on Linux. And here comes the “surprise”: Windows 7 + Ubuntu 10.04 running in virtualbox still gives me 4 hours of battery life.

Best Regards,
Gergely

Pali, 2011/11/14 21:27

Can you try/check if with open source radeon driver brightness not working and after switching to fglrx brightness starts working?

If this is true, then brightness is handled by graphics driver (fglrx) and not ACPI…

iWooki, 2011/07/22 15:11

How is the battery life for you guys.

I'm running an 8560p with Ubuntu 10.04 64 bit and Radeon driver. Brightness set to 100% due to lack of control but only getting 1.5 hours. I hear windows can get 5 hours battery which seems more than just screen brightness coming into play.

Pali, 2011/07/23 23:02

My 8460p - under 2 hours.

You can upgrade to last Ubuntu version - 11.04 and try to change graphics card power profile (should be same as on this page).

Sandra, 2011/10/23 02:06

Mine is about 2:45h, which I suppose is not that bad, but is still considerably less than I get in Windows (4-5h). Has anybody a solution for improving the battery life, using the AMD Radeon card with the fglrx drivers?

Pali, 2011/10/24 22:37

I upgraded to Ubuntu Oneiric 11.10. When I swithched to low radeon profile and configured power in program powertop I can get about more then 3 hours. I do not have any Windows so I cannot compare.

Here is script which can increase battery life (second and third line is not for fglrx):

echo powersave | sudo tee /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
echo profile | sudo tee /sys/class/drm/card0/device/power_method
echo low | sudo tee /sys/class/drm/card0/device/power_profile
sudo x86_energy_perf_policy powersave

I also updated kernel to 3.1, mesa to 7.12, xorg radeon to 6.14.99 - all from xorg-edgers and hibernation started working without any problem.

Jorn, 2012/07/04 19:30

The company I work for have the 8460p with Intel graphics as our standard laptop at the moment. We get it with Windows 7, and it has (at least it reports to have) around 6 hours of battery life with the standard install.

I have installed Ubuntu on mine, currently running 12.04. With Jupiter power management and all the power tweaks I have been able to find on the net, I get at most three hours of battery life. I find this a bit annoying, and hope someone have some tips for me.

At least my battery life is really three hours. I can't attest to the accuracy of the Windows battery life.

Pali, 2011/07/15 12:01

Some news about non working brightness keys:

When ACPI is disabled brigthness up, down and ambient keys are controled by HW. So when I disabled ACPI I'm able to control display brightness. But with disabled ACPI it is not possible to check battery state and all Fn keys does not send events to kernel.

So there must be bug in BIOS or ACPI on my model, because controling brightness does not working via /sys/class/backlight/acpi_video0/brightness (but working when ACPI is disabled in kernel).

To disable acpi boot kernel with option “acpi=off” (append to /etc/default/grub)

Nate, 2011/07/16 10:50

In case you were wondering, my BIOS is 68SCF Ver. F03 dated 4/27/11, Video BIOS Intel 2089

Pali, 2011/07/18 19:54

Here is my info:
BIOS revision: 68SCF Ver. F01
BIOS date: 03/11/2011
Video BIOS revision: ATI 01/28/11

Differences:
* graphics card: LQ166AW#ABA with Intel, LG743EA#BCM with Radeon.
* BIOS version.

Was your BIOS version preinstalled or did you update it?

Nate, 2011/07/18 20:17

Mine came with that revision installed. I just got the laptop last week.

Pali, 2011/07/19 11:31

Can you provide ACPI dump? It can be generated with program acpidump.

Nate, 2011/07/19 12:19

I've installed it. Let me know how you want me to run it (which options, etc.) and I'll post the output somewhere and link to it.

Pali, 2011/07/19 20:08

run without arguments. note that output file is binary.

sudo acpidump > file

Nate, 2011/07/19 20:33

Actually with no arguments it appears the file is a hex dump.
I made two outputs - one ASCII and one binary.
http://goo.gl/u5khz
http://goo.gl/Z3eCG

Pali, 2011/07/23 22:58

I tried to boot Ubuntu with your ACPI DSDT (using grub2 command acpi), but I only get black screen. Maybe upgrading BIOS to F03 may help (or not).

Pali, 2011/07/10 19:36

@Nate:
Can you try to adjust brightness throw sysfs?
echo [value] > /sys/class/backlight/acpi_video0/brightness

Nate, 2011/07/10 22:25

Works here for values between 0 and 20 (max). Had to sudo su first of course.

Pali, 2011/07/11 15:40

Which model do you have? Maybe (my or some) have buggy acpi…

Nate, 2011/07/11 20:49

It says “EliteBook 8460p” on the black trim of the screen.
Under the battery there are a couple stickers, one is for Windows
The other has “Product: LQ166AW#ABA” and a serial number which probably won't help you.

Pali, 2011/07/13 14:30

Ok. I have model LG743EA#BCM. So maybe some models has different acpi :-(

Nate, 2011/07/10 12:46

I'm running Ubuntu 11.04 and my brightness Function+f9 and +f10 are working fine. Its just a default install too, I didn't do anything special.

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hp_elitebook_8460p.txt · Last modified: 2012/07/28 15:09 by pali
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