2008-07-14 19:44:37

by Paolo Ornati

[permalink] [raw]
Subject: BIOS-controlled FN keys works only with "acpi={off | ht}" on Samsung P500

Hello,

on this laptop, Samsung NP-P500Y, some function keys are
BIOS-controlled (they work before Linux boots).

As soon as Linux boots they stop working. Trying some boot options I've
found that "acpi=off" makes them work and the less drastic "acpi=ht"
works too.

I'm mostly interested in brightness adjusting... and since both
xbacklight and radeontool fail I've to use "acpi=ht".

Disabling ACPI is not a good idea on a laptop... so other boot
options/patches to try are welcomed :)


tested kernels: 2.6.22 / 2.6.24 (Ubuntu)
2.6.18 - 2.6.26-rc9 (vanilla)


lspci:
00:00.0 Host bridge: ATI Technologies Inc Unknown device 7930
00:01.0 PCI bridge: ATI Technologies Inc Unknown device 7932
00:05.0 PCI bridge: ATI Technologies Inc Unknown device 7935
00:06.0 PCI bridge: ATI Technologies Inc Unknown device 7936
00:07.0 PCI bridge: ATI Technologies Inc Unknown device 7937
00:12.0 SATA controller: ATI Technologies Inc SB600 Non-Raid-5 SATA
00:13.0 USB Controller: ATI Technologies Inc SB600 USB (OHCI0)
00:13.1 USB Controller: ATI Technologies Inc SB600 USB (OHCI1)
00:13.2 USB Controller: ATI Technologies Inc SB600 USB (OHCI2)
00:13.3 USB Controller: ATI Technologies Inc SB600 USB (OHCI3)
00:13.4 USB Controller: ATI Technologies Inc SB600 USB (OHCI4)
00:13.5 USB Controller: ATI Technologies Inc SB600 USB Controller (EHCI)
00:14.0 SMBus: ATI Technologies Inc SBx00 SMBus Controller (rev 14)
00:14.1 IDE interface: ATI Technologies Inc SB600 IDE
00:14.2 Audio device: ATI Technologies Inc SBx00 Azalia
00:14.3 ISA bridge: ATI Technologies Inc SB600 PCI to LPC Bridge
00:14.4 PCI bridge: ATI Technologies Inc SBx00 PCI to PCI Bridge
01:05.0 VGA compatible controller: ATI Technologies Inc Radeon Xpress 1250
02:00.0 Ethernet controller: Atheros Communications Inc. AR242x 802.11abg Wireless PCI Express Adapter (rev 01)
05:00.0 Ethernet controller: Marvell Technology Group Ltd. 88E8039 PCI-E Fast Ethernet Controller (rev 15)


dmidecode and dmesg attached

Attachments:
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 dmidecode (7.46 kB)
 dmesg (12.20 kB)
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2008-07-15 00:51:44

by Zhang, Rui

[permalink] [raw]
Subject: Re: BIOS-controlled FN keys works only with "acpi={off | ht}" on Samsung P500

On Mon, 2008-07-14 at 21:37 +0200, Paolo Ornati wrote:
> Hello,
>
> on this laptop, Samsung NP-P500Y, some function keys are
> BIOS-controlled (they work before Linux boots).
>
> As soon as Linux boots they stop working. Trying some boot options I've
> found that "acpi=off" makes them work and the less drastic "acpi=ht"
> works too.
>
> I'm mostly interested in brightness adjusting... and since both
> xbacklight and radeontool fail I've to use "acpi=ht".

Please file a bug report at
http://bugzilla.kernel.org/enter_bug.cgi?product=ACPI
and attach the dmesg, acpidump output.

Please run "grep . /sys/firmware/acpi/interrupts/*" both before and
after pressing the brightness hotkey and attach the test result as well.

thanks,
rui

>
> Disabling ACPI is not a good idea on a laptop... so other boot
> options/patches to try are welcomed :)
>
>
> tested kernels: 2.6.22 / 2.6.24 (Ubuntu)
> 2.6.18 - 2.6.26-rc9 (vanilla)
>
>
> lspci:
> 00:00.0 Host bridge: ATI Technologies Inc Unknown device 7930
> 00:01.0 PCI bridge: ATI Technologies Inc Unknown device 7932
> 00:05.0 PCI bridge: ATI Technologies Inc Unknown device 7935
> 00:06.0 PCI bridge: ATI Technologies Inc Unknown device 7936
> 00:07.0 PCI bridge: ATI Technologies Inc Unknown device 7937
> 00:12.0 SATA controller: ATI Technologies Inc SB600 Non-Raid-5 SATA
> 00:13.0 USB Controller: ATI Technologies Inc SB600 USB (OHCI0)
> 00:13.1 USB Controller: ATI Technologies Inc SB600 USB (OHCI1)
> 00:13.2 USB Controller: ATI Technologies Inc SB600 USB (OHCI2)
> 00:13.3 USB Controller: ATI Technologies Inc SB600 USB (OHCI3)
> 00:13.4 USB Controller: ATI Technologies Inc SB600 USB (OHCI4)
> 00:13.5 USB Controller: ATI Technologies Inc SB600 USB Controller (EHCI)
> 00:14.0 SMBus: ATI Technologies Inc SBx00 SMBus Controller (rev 14)
> 00:14.1 IDE interface: ATI Technologies Inc SB600 IDE
> 00:14.2 Audio device: ATI Technologies Inc SBx00 Azalia
> 00:14.3 ISA bridge: ATI Technologies Inc SB600 PCI to LPC Bridge
> 00:14.4 PCI bridge: ATI Technologies Inc SBx00 PCI to PCI Bridge
> 01:05.0 VGA compatible controller: ATI Technologies Inc Radeon Xpress 1250
> 02:00.0 Ethernet controller: Atheros Communications Inc. AR242x 802.11abg Wireless PCI Express Adapter (rev 01)
> 05:00.0 Ethernet controller: Marvell Technology Group Ltd. 88E8039 PCI-E Fast Ethernet Controller (rev 15)
>
>
> dmidecode and dmesg attached

2008-07-16 19:28:19

by Paolo Ornati

[permalink] [raw]
Subject: Re: BIOS-controlled FN keys works only with "acpi={off | ht}" on Samsung P500

On Tue, 15 Jul 2008 08:49:57 +0800
Zhang Rui <[email protected]> wrote:

> > on this laptop, Samsung NP-P500Y, some function keys are
> > BIOS-controlled (they work before Linux boots).
> >
> > As soon as Linux boots they stop working. Trying some boot options
> > I've found that "acpi=off" makes them work and the less drastic
> > "acpi=ht" works too.
> >
> > I'm mostly interested in brightness adjusting... and since both
> > xbacklight and radeontool fail I've to use "acpi=ht".
>
> Please file a bug report at
> http://bugzilla.kernel.org/enter_bug.cgi?product=ACPI
> and attach the dmesg, acpidump output.
>
> Please run "grep . /sys/firmware/acpi/interrupts/*" both before and
> after pressing the brightness hotkey and attach the test result as
> well.

done:
http://bugzilla.kernel.org/show_bug.cgi?id=11102


Thanks,
Paolo