Setting ACPI_PROCFS=n breaks ACPI power management, though ACPI_PROCFS is deprecated.

[Miles Lane]

In 2.6.21-rc5-mm3, the ACPI_PROCFS option is marked as deprecated.
Here's the configuration information for the option:

  CONFIG_ACPI_PROCFS:

  │ Procfs interface for ACPI is made optional for back-compatible.
  │ As the same functions are duplicated in sysfs interface
  │ and this proc interface will be removed some time later, it's
marked as deprecated.
  │ ( /proc/acpi/debug_layer && debug_level are deprecated by
  │ /sys/module/acpi/parameters/debug_layer && debug_level.
  │ /proc/acpi/info is deprecated by
/sys/module/acpi/parameters/acpica_version )

It sounds as though Ubuntu 7.04 should work, even when the kernel is
built without this option being enabled. And yet I find that, if I
disable this option, the laptop lid button does not trigger a suspend.
Also, gnome-power-manager always thinks the machine is plugged into AC
and never thinks the battery is being charged.

The laptop is a HP dv1240us:

00:00.0 Host bridge: Intel Corporation 82852/82855 GM/GME/PM/GMV
Processor to I/O Controller (rev 02)
00:00.1 System peripheral: Intel Corporation 82852/82855 GM/GME/PM/GMV
Processor to I/O Controller (rev 02)
00:00.3 System peripheral: Intel Corporation 82852/82855 GM/GME/PM/GMV
Processor to I/O Controller (rev 02)
00:02.0 VGA compatible controller: Intel Corporation 82852/855GM
Integrated Graphics Device (rev 02)
00:02.1 Display controller: Intel Corporation 82852/855GM Integrated
Graphics Device (rev 02)
00:1d.0 USB Controller: Intel Corporation 82801DB/DBL/DBM
(ICH4/ICH4-L/ICH4-M) USB UHCI Controller #1 (rev 03)
00:1d.1 USB Controller: Intel Corporation 82801DB/DBL/DBM
(ICH4/ICH4-L/ICH4-M) USB UHCI Controller #2 (rev 03)
00:1d.2 USB Controller: Intel Corporation 82801DB/DBL/DBM
(ICH4/ICH4-L/ICH4-M) USB UHCI Controller #3 (rev 03)
00:1d.7 USB Controller: Intel Corporation 82801DB/DBM (ICH4/ICH4-M)
USB2 EHCI Controller (rev 03)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev 83)
00:1f.0 ISA bridge: Intel Corporation 82801DBM (ICH4-M) LPC Interface
Bridge (rev 03)
00:1f.1 IDE interface: Intel Corporation 82801DBM (ICH4-M) IDE
Controller (rev 03)
00:1f.3 SMBus: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M)
SMBus Controller (rev 03)
00:1f.5 Multimedia audio controller: Intel Corporation 82801DB/DBL/DBM
(ICH4/ICH4-L/ICH4-M) AC'97 Audio Controller (rev 03)
00:1f.6 Modem: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M)
AC'97 Modem Controller (rev 03)
01:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd.
RTL-8139/8139C/8139C+ (rev 10)
01:06.0 Network controller: Intel Corporation PRO/Wireless 2200BG
Network Connection (rev 05)
01:09.0 CardBus bridge: Texas Instruments PCIxx21/x515 Cardbus Controller
01:09.2 FireWire (IEEE 1394): Texas Instruments OHCI Compliant IEEE
1394 Host Controller
01:09.3 Mass storage controller: Texas Instruments PCIxx21 Integrated
FlashMedia Controller
01:09.4 Generic system peripheral [0805]: Texas Instruments
PCI6411/6421/6611/6621/7411/7421/7611/7621 Secure Digital Controller

ProblemType: Bug
Architecture: i386
Date: Sat Mar 31 16:59:07 2007
DistroRelease: Ubuntu 7.04
Uname: Linux FractalPath 2.6.21-rc5-mm3 #36 PREEMPT Sat Mar 31
16:05:58 PDT 2007 i686 GNU/Linux