Hey all,

I just recently picked up a Thinkpad T23, and the first thing I did was throw Kubuntu Linux on it, while keeping the pre-existing Windows 2000 on its own partition for later use.

After booting Linux, however, I heard a high pitched buzzing sound coming from the computer itself. I muted the volume, and the sound continued. I pressed my ear up to the computer, and it sounds like the noise is coming from the computer itself.

This high pitched buzz does NOT comes happen when Windows is run.

Furthermore, if I drag a window around rapidly in KDE, the sound stops until I stop moving them. Almost seems like a fan on my video card is acting up with my current drivers, but I really am at a loss. Anyone have any ideas? As I said, this does not happen in Windows.

Currently running:
Kubuntu Linux
2.6.10-5-386

lspci:
000:00:00.0 Host bridge: Intel Corp. 82830 830 Chipset Host Bridge (rev 02)
0000:00:01.0 PCI bridge: Intel Corp. 82830 830 Chipset AGP Bridge (rev 02)
0000:00:1d.0 USB Controller: Intel Corp. 82801CA/CAM USB (Hub #1) (rev 01)
0000:00:1d.1 USB Controller: Intel Corp. 82801CA/CAM USB (Hub #2) (rev 01)
0000:00:1d.2 USB Controller: Intel Corp. 82801CA/CAM USB (Hub #3) (rev 01)
0000:00:1e.0 PCI bridge: Intel Corp. 82801 PCI Bridge (rev 41)
0000:00:1f.0 ISA bridge: Intel Corp. 82801CAM ISA Bridge (LPC) (rev 01)
0000:00:1f.1 IDE interface: Intel Corp. 82801CAM IDE U100 (rev 01)
0000:00:1f.3 SMBus: Intel Corp. 82801CA/CAM SMBus Controller (rev 01)
0000:00:1f.5 Multimedia audio controller: Intel Corp. 82801CA/CAM AC'97 Audio Controller (rev 01)
0000:01:00.0 VGA compatible controller: S3 Inc. SuperSavage IX/C SDR (rev 05)
0000:02:00.0 CardBus bridge: Texas Instruments PCI1420
0000:02:00.1 CardBus bridge: Texas Instruments PCI1420
0000:02:02.0 Communication controller: Lucent Microelectronics WinModem 56k (rev 01)
0000:02:08.0 Ethernet controller: Intel Corp. 82801CAM (ICH3) PRO/100 VE (LOM) Ethernet Controller (rev 41)
0000:03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8180L 802.11b MAC (rev 20)


dmesg:
burgy@zissou:~$ dmesg
0000000 00000000
CPU: After vendor identify, caps: 0383f9ff 00000000 00000000 00000000 00000000 00000000
CPU: L1 I cache: 16K, L1 D cache: 16K
CPU: L2 cache: 512K
CPU: After all inits, caps: 0383f9ff 00000000 00000000 00000040 00000000 00000000
CPU: Intel(R) Pentium(R) III Mobile CPU 1133MHz stepping 01
Enabling fast FPU save and restore... done.
Enabling unmasked SIMD FPU exception support... done.
Checking 'hlt' instruction... OK.
Checking for popad bug... OK.
ACPI: Looking for DSDT in initrd... not found!
ACPI: setting ELCR to 0200 (from 0800)
checking if image is initramfs...it isn't (bad gzip magic numbers); looks like an initrd
Freeing initrd memory: 4300k freed
NET: Registered protocol family 16
EISA bus registered
PCI: PCI BIOS revision 2.10 entry at 0xfd8fe, last bus=8
PCI: Using configuration type 1
mtrr: v2.0 (20020519)
ACPI: Subsystem revision 20050211
ACPI: Found ECDT
ACPI: Could not use ECDT
ACPI-0265: *** Error: Region EmbeddedControl(3) has no handler
ACPI-1138: *** Error: Method execution failed [\_SB_.PCI0.LPC_.FDC_._INI] (Node dfb0b340), AE_NOT_EXIST
ACPI-0265: *** Error: Region EmbeddedControl(3) has no handler
ACPI-1138: *** Error: Method execution failed [\_SB_.PCI0.LPC_.EC__._INI] (Node dfb14420), AE_NOT_EXIST
ACPI-0265: *** Error: Region EmbeddedControl(3) has no handler
ACPI-1138: *** Error: Method execution failed [\_SB_.PCI0.LPC_.EC__.BAT0._STA] (Node dfb11f40), AE_NOT_EXIST
ACPI-0158: *** Error: Method execution failed [\_SB_.PCI0.LPC_.EC__.BAT0._STA] (Node dfb11f40), AE_NOT_EXIST
ACPI-0265: *** Error: Region EmbeddedControl(3) has no handler
ACPI-1138: *** Error: Method execution failed [\_SB_.PCI0.LPC_.EC__.BAT1._STA] (Node dfb11dc0), AE_NOT_EXIST
ACPI-0158: *** Error: Method execution failed [\_SB_.PCI0.LPC_.EC__.BAT1._STA] (Node dfb11dc0), AE_NOT_EXIST
ACPI-0265: *** Error: Region EmbeddedControl(3) has no handler
ACPI-1138: *** Error: Method execution failed [\_SB_.PCI0.LPC_.EC__.BGID] (Node dfb0b480), AE_NOT_EXIST
ACPI-1138: *** Error: Method execution failed [\_SB_.PCI0.LPC_.EC__.BINI] (Node dfb0b4a0), AE_NOT_EXIST
ACPI-1138: *** Error: Method execution failed [\_SB_.PCI0.LPC_.EC__.BSTA] (Node dfb0b4e0), AE_NOT_EXIST
ACPI-1138: *** Error: Method execution failed [\_SB_.PCI0.IDE0.SCND.MSTR._STA] (Node dfb0b3a0), AE_NOT_EXIST
ACPI-0158: *** Error: Method execution failed [\_SB_.PCI0.IDE0.SCND.MSTR._STA] (Node dfb0b3a0), AE_NOT_EXIST
ACPI-0265: *** Error: Region EmbeddedControl(3) has no handler
ACPI-1138: *** Error: Method execution failed [\_SB_.PCI0.LPC_.EC__.BGID] (Node dfb0b480), AE_NOT_EXIST
ACPI-1138: *** Error: Method execution failed [\_SB_.PCI0.LPC_.EC__.BINI] (Node dfb0b4a0), AE_NOT_EXIST
ACPI-1138: *** Error: Method execution failed [\_SB_.PCI0.LPC_.EC__.BSTA] (Node dfb0b4e0), AE_NOT_EXIST
ACPI-1138: *** Error: Method execution failed [\_SB_.PCI0.USB0.URTH.UNST._STA] (Node dfb0d9c0), AE_NOT_EXIST
ACPI-0158: *** Error: Method execution failed [\_SB_.PCI0.USB0.URTH.UNST._STA] (Node dfb0d9c0), AE_NOT_EXIST
ACPI-0265: *** Error: Region EmbeddedControl(3) has no handler
ACPI-1138: *** Error: Method execution failed [\_SB_.PCI0.LPC_.EC__.BGID] (Node dfb0b480), AE_NOT_EXIST
ACPI-1138: *** Error: Method execution failed [\_SB_.PCI0.LPC_.EC__.BINI] (Node dfb0b4a0), AE_NOT_EXIST
ACPI-1138: *** Error: Method execution failed [\_SB_.PCI0.LPC_.EC__.BSTA] (Node dfb0b4e0), AE_NOT_EXIST
ACPI-1138: *** Error: Method execution failed [\_SB_.NEST._STA] (Node dfb0b1e0), AE_NOT_EXIST
ACPI-0158: *** Error: Method execution failed [\_SB_.NEST._STA] (Node dfb0b1e0), AE_NOT_EXIST
ACPI: Interpreter enabled
ACPI: Using PIC for interrupt routing
ACPI: PCI Interrupt Link [LNKA] (IRQs 3 4 5 6 7 9 10 *11)
ACPI: PCI Interrupt Link [LNKB] (IRQs 3 4 5 6 7 9 10 *11)
ACPI: PCI Interrupt Link [LNKC] (IRQs 3 4 5 6 7 9 10 *11)
ACPI: PCI Interrupt Link [LNKD] (IRQs 3 4 5 6 7 9 10 *11)
ACPI: PCI Interrupt Link [LNKE] (IRQs 3 4 5 6 7 9 10 *11)
ACPI: PCI Interrupt Link [LNKF] (IRQs 3 4 5 6 7 9 10 11) *0, disabled.
ACPI: PCI Interrupt Link [LNKG] (IRQs 3 4 5 6 7 9 10 11) *0, disabled.
ACPI: PCI Interrupt Link [LNKH] (IRQs 3 4 5 6 7 9 10 11) *0, disabled.
ACPI: PCI Root Bridge [PCI0] (00:00)
PCI: Probing PCI hardware (bus 00)
PCI: Ignoring BAR0-3 of IDE controller 0000:00:1f.1
PCI: Transparent bridge - 0000:00:1e.0
ACPI: PCI Interrupt Routing Table [\_SB_.PCI0._PRT]
ACPI: Embedded Controller [EC] (gpe 28)
ACPI: Power Resource [PUBS] (on)
ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.AGP_._PRT]
ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.PCI1._PRT]
Linux Plug and Play Support v0.97 (c) Adam Belay
pnp: PnP ACPI init
pnp: PnP ACPI: found 13 devices
PnPBIOS: Disabled by ACPI PNP
PCI: Using ACPI for IRQ routing
** PCI interrupts are no longer routed automatically. If this
** causes a device to stop working, it is probably because the
** driver failed to call pci_enable_device(). As a temporary
** workaround, the "pci=routeirq" argument restores the old
** behavior. If this argument makes the device work again,
** please email the output of "lspci" to bjorn.helgaas@hp.com
** so I can fix the driver.
Simple Boot Flag at 0x35 set to 0x1
audit: initializing netlink socket (disabled)
audit(1132224542.249:0): initialized
VFS: Disk quotas dquot_6.5.1
Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
devfs: 2004-01-31 Richard Gooch (rgooch@atnf.csiro.au)
devfs: boot_options: 0x0
Initializing Cryptographic API
isapnp: Scanning for PnP cards...
isapnp: No Plug & Play device found
serio: i8042 AUX port at 0x60,0x64 irq 12
serio: i8042 KBD port at 0x60,0x64 irq 1
Serial: 8250/16550 driver $Revision: 1.90 $ 54 ports, IRQ sharing enabled
ttyS0 at I/O 0x3f8 (irq = 4) is a NS16550A
ttyS1 at I/O 0x2f8 (irq = 3) is a NS16550A
ttyS0 at I/O 0x3f8 (irq = 4) is a NS16550A
io scheduler noop registered
io scheduler anticipatory registered
io scheduler deadline registered
io scheduler cfq registered
RAMDISK driver initialized: 16 RAM disks of 8192K size 1024 blocksize
input: AT Translated Set 2 keyboard on isa0060/serio0
EISA: Probing bus 0 at eisa0
Cannot allocate resource for EISA slot 1
Cannot allocate resource for EISA slot 6
EISA: Detected 0 cards.
NET: Registered protocol family 2
IP: routing cache hash table of 4096 buckets, 32Kbytes
TCP: Hash tables configured (established 32768 bind 65536)
NET: Registered protocol family 8
NET: Registered protocol family 20
Restarting tasks...<6> Strange, kswapd0 not stopped
Strange, kseriod not stopped
done
ACPI wakeup devices:
LID SLPB PCI0 UART PCI1 USB0 USB1 USB2 AC97
ACPI: (supports S0 S3 S4 S5)
RAMDISK: cramfs filesystem found at block 0
RAMDISK: Loading 4300KiB [1 disk] into ram disk... done.
VFS: Mounted root (cramfs filesystem) readonly.
Freeing unused kernel memory: 224k freed
ACPI: CPU0 (power states: C1[C1] C2[C2] C3[C3])
ACPI: Thermal Zone [THM0] (28 C)
NET: Registered protocol family 1
Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
ICH3M: IDE controller at PCI slot 0000:00:1f.1
PCI: Enabling device 0000:00:1f.1 (0005 -> 0007)
ACPI: PCI Interrupt Link [LNKC] enabled at IRQ 11
PCI: setting IRQ 11 as level-triggered
ACPI: PCI interrupt 0000:00:1f.1[A] -> GSI 11 (level, low) -> IRQ 11
ICH3M: chipset revision 1
ICH3M: not 100% native mode: will probe irqs later
ide0: BM-DMA at 0x1860-0x1867, BIOS settings: hdaMA, hdbio
ide1: BM-DMA at 0x1868-0x186f, BIOS settings: hdcMA, hddio
Probing IDE interface ide0...
hda: IC25N030ATCS04-0, ATA DISK drive
elevator: using anticipatory as default io scheduler
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
hda: max request size: 128KiB
hda: 58605120 sectors (30005 MB) w/1768KiB Cache, CHS=62016/15/63, UDMA(100)
hda: cache flushes not supported
/dev/ide/host0/bus0/target0/lun0: p1 p2 p3 p4 < p5 >
Probing IDE interface ide1...
hdc: HL-DT-STDVD-ROM GDR8081N, ATAPI CD/DVD-ROM drive
ide1 at 0x170-0x177,0x376 on irq 15
Probing IDE interface ide2...
Probing IDE interface ide3...
Probing IDE interface ide4...
Probing IDE interface ide5...
Stopping tasks: ==|
Freeing memory... done (459 pages freed)
Restarting tasks... done
EXT3-fs: mounted filesystem with ordered data mode.
kjournald starting. Commit interval 5 seconds
Adding 763048k swap on /dev/hda5. Priority:-1 extents:1
EXT3 FS on hda3, internal journal
hdc: ATAPI 24X DVD-ROM drive, 512kB Cache
Uniform CD-ROM driver Revision: 3.20
parport: PnPBIOS parport detected.
parport0: PC-style at 0x3bc (0x7bc), irq 7, dma 0 [PCSPP,TRISTATE,COMPAT,ECP,DMA]
lp0: using parport0 (interrupt-driven).
mice: PS/2 mouse device common for all mice
input: PS/2 Generic Mouse on isa0060/serio1
usbcore: registered new driver usbfs
usbcore: registered new driver hub
ndiswrapper version 1.4 loaded (preempt=yes,smp=no)
ts: Compaq touchscreen protocol output
Capability LSM initialized
device-mapper: 4.3.0-ioctl (2004-09-30) initialised: dm-devel@redhat.com
md: md driver 0.90.1 MAX_MD_DEVS=256, MD_SB_DISKS=27
cdrom: open failed.
input: PC Speaker
Real Time Clock Driver v1.12
inserting floppy driver for 2.6.10-5-386
Floppy drive(s): fd0 is 1.44M
FDC 0 is a National Semiconductor PC87306
irda_init()
NET: Registered protocol family 23
Linux agpgart interface v0.100 (c) Dave Jones
agpgart: Detected an Intel 830M Chipset.
agpgart: Maximum main memory to use for agp memory: 439M
agpgart: AGP aperture is 256M @ 0xd0000000
cpci_hotplug: CompactPCI Hot Plug Core version: 0.2
pci_hotplug: PCI Hot Plug PCI Core version: 0.5
shpchp: acpi_shpchprm:\_SB_.PCI0.PCI1 _HPP fail=0x5
shpchp: acpi_pciehprm:\_SB_.PCI0.PCI1 OSHP fails=0x5
shpchp: acpi_shpchprm: Slot sun(1) at s:b:d:f=0x00:02:00:00
shpchp: acpi_shpchprm:\_SB_.PCI0.PCI1 _HPP fail=0x5
shpchp: acpi_pciehprm:\_SB_.PCI0.PCI1 OSHP fails=0x5
shpchp: acpi_shpchprm: Slot sun(2) at s:b:d:f=0x00:02:00:01
shpchp: shpc_init : shpc_cap_offset == 0
shpchp: shpc_init : shpc_cap_offset == 0
shpchp: Standard Hot Plug PCI Controller Driver version: 0.4
Evaluate _OSC Set fails. Status = 0x0005
pciehp: add_host_bridge: status 5
pciehp: acpi_pciehprm:\_SB_.PCI0.PCI1 _HPP fail=0x5
pciehp: acpi_pciehprm:\_SB_.PCI0.PCI1 OSHP fails=0x5
pciehp: acpi_pciehprm: Slot sun(1) at s:b:d:f=0x00:02:00:00
pciehp: acpi_pciehprm:\_SB_.PCI0.PCI1 _HPP fail=0x5
pciehp: acpi_pciehprm:\_SB_.PCI0.PCI1 OSHP fails=0x5
pciehp: acpi_pciehprm: Slot sun(2) at s:b:d:f=0x00:02:00:01
pciehp: Fails to gain control of native hot-plug
USB Universal Host Controller Interface driver v2.2
ACPI: PCI Interrupt Link [LNKA] enabled at IRQ 11
ACPI: PCI interrupt 0000:00:1d.0[A] -> GSI 11 (level, low) -> IRQ 11
uhci_hcd 0000:00:1d.0: Intel Corp. 82801CA/CAM USB (Hub #1)
PCI: Setting latency timer of device 0000:00:1d.0 to 64
uhci_hcd 0000:00:1d.0: irq 11, io base 0x1800
uhci_hcd 0000:00:1d.0: new USB bus registered, assigned bus number 1
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 2 ports detected
ACPI: PCI Interrupt Link [LNKD] enabled at IRQ 11
ACPI: PCI interrupt 0000:00:1d.1[B] -> GSI 11 (level, low) -> IRQ 11
uhci_hcd 0000:00:1d.1: Intel Corp. 82801CA/CAM USB (Hub #2)
PCI: Setting latency timer of device 0000:00:1d.1 to 64
uhci_hcd 0000:00:1d.1: irq 11, io base 0x1820
uhci_hcd 0000:00:1d.1: new USB bus registered, assigned bus number 2
hub 2-0:1.0: USB hub found
hub 2-0:1.0: 2 ports detected
ACPI: PCI interrupt 0000:00:1d.2[C] -> GSI 11 (level, low) -> IRQ 11
uhci_hcd 0000:00:1d.2: Intel Corp. 82801CA/CAM USB (Hub #3)
PCI: Setting latency timer of device 0000:00:1d.2 to 64
uhci_hcd 0000:00:1d.2: irq 11, io base 0x1840
uhci_hcd 0000:00:1d.2: new USB bus registered, assigned bus number 3
hub 3-0:1.0: USB hub found
hub 3-0:1.0: 2 ports detected
Evaluate _OSC Set fails. Status = 0x0005
pciehp: add_host_bridge: status 5
pciehp: acpi_pciehprm:\_SB_.PCI0.PCI1 _HPP fail=0x5
pciehp: acpi_pciehprm:\_SB_.PCI0.PCI1 OSHP fails=0x5
pciehp: acpi_pciehprm: Slot sun(1) at s:b:d:f=0x00:02:00:00
pciehp: acpi_pciehprm:\_SB_.PCI0.PCI1 _HPP fail=0x5
pciehp: acpi_pciehprm:\_SB_.PCI0.PCI1 OSHP fails=0x5
pciehp: acpi_pciehprm: Slot sun(2) at s:b:d:f=0x00:02:00:01
pciehp: Fails to gain control of native hot-plug
hw_random hardware driver 1.0.0 loaded
PCI: Enabling device 0000:00:1f.5 (0000 -> 0001)
ACPI: PCI Interrupt Link [LNKB] enabled at IRQ 11
ACPI: PCI interrupt 0000:00:1f.5[B] -> GSI 11 (level, low) -> IRQ 11
PCI: Setting latency timer of device 0000:00:1f.5 to 64
intel8x0_measure_ac97_clock: measured 49873 usecs
intel8x0: clocking to 48000
Linux Kernel Card Services
options: [pci] [cardbus] [pm]
ACPI: PCI interrupt 0000:02:00.0[A] -> GSI 11 (level, low) -> IRQ 11
Yenta: CardBus bridge found at 0000:02:00.0 [1014:023b]
Yenta: Using INTVAL to route CSC interrupts to PCI
Yenta: Routing CardBus interrupts to PCI
Yenta TI: socket 0000:02:00.0, mfunc 0x01d21022, devctl 0x64
Yenta: ISA IRQ mask 0x0438, PCI irq 11
Socket status: 30000020
ACPI: PCI interrupt 0000:02:00.1[B] -> GSI 11 (level, low) -> IRQ 11
Yenta: CardBus bridge found at 0000:02:00.1 [1014:023b]
Yenta: Using INTVAL to route CSC interrupts to PCI
Yenta: Routing CardBus interrupts to PCI
Yenta TI: socket 0000:02:00.1, mfunc 0x01d21022, devctl 0x64
Yenta: ISA IRQ mask 0x0438, PCI irq 11
Socket status: 30000006
e100: Intel(R) PRO/100 Network Driver, 3.2.3-k2-NAPI
e100: Copyright(c) 1999-2004 Intel Corporation
ACPI: PCI Interrupt Link [LNKE] enabled at IRQ 11
ACPI: PCI interrupt 0000:02:08.0[A] -> GSI 11 (level, low) -> IRQ 11
e100: eth0: e100_probe: addr 0xc0200000, irq 11, MAC addr 000:59:C1:1B:84
ndiswrapper: driver net8180 (Realtek,07/09/2004,5.170.0709.2004) loaded
PCI: Enabling device 0000:03:00.0 (0000 -> 0003)
ACPI: PCI interrupt 0000:03:00.0[A] -> GSI 11 (level, low) -> IRQ 11
PCI: Setting latency timer of device 0000:03:00.0 to 64
ndiswrapper: using irq 11
wlan0: vendor: 'Realtek RTL8180 Wireless LAN (Mini-)PCI NIC '
wlan0: ndiswrapper ethernet device 00:0c:41:c1:d5:e0 using driver net8180, 10EC:8180.5.conf
wlan0: encryption modes supported: WEP; TKIP with WPA; AES/CCMP with WPA
ACPI: AC Adapter [AC] (on-line)
ACPI: Battery Slot [BAT0] (battery present)
ACPI: Power Button (FF) [PWRF]
ACPI: Lid Switch [LID]
ACPI: Sleep Button (CM) [SLPB]
ibm_acpi: IBM ThinkPad ACPI Extras v0.8
ibm_acpi: http://ibm-acpi.sf.net/
ibm_acpi: dock device not present
ACPI: Video Device [VID] (multi-head: yes rom: no post: no)
IBM machine detected. Enabling interrupts during APM calls.
apm: BIOS version 1.2 Flags 0x03 (Driver version 1.16ac)
apm: overridden by ACPI.
cs: IO port probe 0x0100-0x04ff: excluding 0x4d0-0x4d7
cs: IO port probe 0x0800-0x08ff: clean.
cs: IO port probe 0x0c00-0x0cff: clean.
cs: IO port probe 0x0a00-0x0aff: clean.
NET: Registered protocol family 10
Disabled Privacy Extensions on device c02f0500(lo)
IPv6 over IPv4 tunneling driver
NET: Registered protocol family 17
wlan0: no IPv6 routers present


Thanks!

do you have a live cd you can try, knoppix, etc. ? if it doesn't make the sound there, you can start comparing the settings, drivers, etc. to try to isolate what's causing it. does it make the sound when you are logged out of X?

Hi again,

I've narrowed down what the problem is. I've discovered that, after booting with ACPI enabled, laptop buzzes. It's likely that ACPI is spinning a fan inside at some uncommon rate. With ACPI enabled, combined with me running some process-intensive program, the buzzing leaves.

Is there a way to reconfigure ACPI, and how it controls the fan? Or is there a way that I can use the laptop without ACPI installed, yet still retain some power management controls? I tried suspending wihtout ACPI, and only APM running. It didn't work. The screen blanked, but that was it.

Thanks!

Also, the problem does happen when I am not in X. It starts as soon as ACPI begins. I have been unable to test with an live CDs as of late, but I will do so soon.

you should be able to append acpi=off to your kernel boot parameters. if the problem is acpi, that might solve it.

Hi slackhack,

I did that, but then I was not able to suspend my laptop. But you are right, that did solve the buzzing problem.

Is it possible to suspend without ACPI installed? Or can I simply modify ACPI's config to use the fan properly?

Thanks for the help!

you can probably use apm instead of acpi. i use apm for sleep, suspend to ram, suspend on lid close, battery monitoring, etc. just make sure it's in the kernel, and add apm=on to the kernel append along with acpi=off.

Hello,

I tried your suggestion. That solves the buzzing issue, but I seem to have trouble getting the laptop to suspend.

When I attempt to suspend with only APM running, the screen blanks, but the laptop itself remains running. Pressing any key turns the display back on.

I've added "apm=on acpi=off noacpi" to the boot parameters of the kernel, and ensured "apm" is added to the modules list (without the quotes, of course).

The odd thing is, if I type "apm -s" at the console, the laptop suspends perfectly.

Any ideas?

Thanks!