Problem with high pitch noises - Revision history

ThinkGNU: Linux is not an OS. Typo.

2025-04-12T00:56:11Z

Linux is not an OS. Typo.

Maikel: /* Disable USB */ reorganize text

2014-01-22T02:09:41Z

‎Disable USB: reorganize text

Maikel: /* Turn off CPU power saving in the BIOS */ adding X200s as working model

2014-01-22T02:05:43Z

‎Turn off CPU power saving in the BIOS: adding X200s as working model

Vaclav.stepan: Add Windows solution for disabling C4->C[123] popup.

2010-11-06T18:35:31Z

Add Windows solution for disabling C4->C[123] popup.

Vaclav.stepan: /* Upgrade BIOS */

2010-11-06T18:21:00Z

‎Upgrade BIOS

Vaclav.stepan: /* Upgrade BIOS */

2010-11-06T18:20:00Z

‎Upgrade BIOS

Vaclav.stepan: Added X61 as model susceptible to C4 caused whining

2010-11-06T18:14:57Z

Added X61 as model susceptible to C4 caused whining

Alfus: /* Other solutions */ added fan speed

2010-09-05T19:49:04Z

‎Other solutions: added fan speed

Alfus: added another reason for pitch sound

2010-09-05T19:46:58Z

added another reason for pitch sound

Thhart: /* Possible sources */ Added power supply

2010-06-16T06:37:33Z

‎Possible sources: Added power supply

@@ Line 187: / Line 187: @@
 ==Affected Operating Systems==
-All, though Linux appears especially susceptible.
+All, though GNU/Linux appears especially susceptible.
 ==Possible sources==
@@ Line 289: / Line 289: @@
 Change the "HZ" kernel constants to alter the frequency of timer interrupts. Discussion:
-{{NOTE|The timer interrupt frequency (HZ) in current Linux kernels is directly tied to the kernel task scheduler.  Lower frequencies provide larger time-slices and thus also higher latencies (which may kill latency-sensitive applications like audio processing). 100Hz ended up as the recommended "server" setting (because it increases disk/CPU throughput in a latency-insensitive environment).  Higher frequencies are better for latency-sensitive applications, and improve desktop responsivity at the cost of less processor throughput. 1000Hz ended up as the recommended "desktop" setting.}}
+{{NOTE|The timer interrupt frequency (HZ) in current kernels is directly tied to Linux's task scheduler.  Lower frequencies provide larger time-slices and thus also higher latencies (which may kill latency-sensitive applications like audio processing). 100Hz ended up as the recommended "server" setting (because it increases disk/CPU throughput in a latency-insensitive environment).  Higher frequencies are better for latency-sensitive applications, and improve desktop responsivity at the cost of less processor throughput. 1000Hz ended up as the recommended "desktop" setting.}}
-*Andreas Karnahl: i've read in several forums it has something to do with the "idle"-state (or "C3") of the processor. There is a frequency called "timer interrupt" (or so mething like that). Since kernel 2.6x it is set to 1000 Hz by default (compared to 100 Hz in Kernel 2.4x). The exact reason i don't know, but it is safe to change this frequency to 100 Hz in kernel 2.6x (by the way, windows up to XP uses 100 Hz by default).<br />Just do the following:<br />
+*Andreas Karnahl: i've read in several forums it has something to do with the "idle"-state (or "C3") of the processor. There is a frequency called "timer interrupt" (or something like that). Since kernel 2.6x it is set to 1000 Hz by default (compared to 100 Hz in Kernel 2.4x). The exact reason i don't know, but it is safe to change this frequency to 100 Hz in kernel 2.6x (by the way, windows up to XP uses 100 Hz by default).<br />Just do the following:<br />
 :   In {{path|[path to kernel-sources]/include/asm-i386/param.h}} find the line
 ::       <code>#define HZ 1000</code>

@@ Line 366: / Line 366: @@
 ===Disable USB===
-On one {{T43}} and one {{X60}}, (partially) disabling USB using {{cmdroot|rmmod uhci_hcd}} significantly reduced the noise. Also, on a {{T60}} this trick worked well, doing ''rmmod/modprobe'' twice wiped the noise permanently.
+Disabling USB (partially) using {{cmdroot|rmmod uhci_hcd}} significantly reduced the noise in some cases.
 *syscrash: Plugging in my USB mouse has completely solved the problem for me.

@@ Line 263: / Line 263: @@
 ===Turn off CPU power saving in the BIOS===
-Go into the BIOS and turn off the power saving processor feature that puts it into idle mode.  This should be somewhere under Config/Power - look for "CPU Power Management", the default being automatic.  Set "CPU Power Management" to "Disabled" (This worked on a ThinkPad {{T43}}, {{T21}}, {{X60s}}, {{T60}} and {{Z61m}}). However, this also affects power consumption when the CPU is idle, it's similar to disabling the C4/C3 ACPI CPU power state. For example, on a Z61m 9450-3HG, a full charged battery with power management enabled in the BIOS provides the notebook with power for about 3.5h, if disabled, the battery-lifetime is only about 2h.
+Go into the BIOS and turn off the power saving processor feature that puts it into idle mode.  This should be somewhere under Config/Power - look for "CPU Power Management", the default being automatic.  Set "CPU Power Management" to "Disabled" (This worked on a ThinkPad {{T21}}, {{T43}}, {{T60}}, {{X60s}}, {{X200s}} and {{Z61m}}). However, this also affects power consumption when the CPU is idle, it's similar to disabling the C4/C3 ACPI CPU power state. For example, on a Z61m 9450-3HG, a full charged battery with power management enabled in the BIOS provides the notebook with power for about 3.5h, if disabled, the battery-lifetime is only about 2h.
 ===Disable ACPI CPU power states===

← Older revision		Revision as of 18:35, 6 November 2010
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	*Jakob Schou Pedersen: Editing the file {{path\|/etc/init.d/acpid}} as described above (the last solution) worked on my T43 :-)		*Jakob Schou Pedersen: Editing the file {{path\|/etc/init.d/acpid}} as described above (the last solution) worked on my T43 :-)
		+
		+	===MS Windows: Disable CPU popup mode ===
		+
		+	This is a generic solution for Core 2 Duo platforms --- using the RMClock utility you can disable C4 to C1/C2/C3 transition and force the CPU to go straight to C0. To do this, in RMClock settings go to: "Enable Advanced CPU settings > Chipset" and disable at least "Enable Popup Mode". Related discussion can be found here: [[http://forum.thinkpads.com/viewtopic.php?f=30&t=75283]].

	===Turn off CPU power saving in the BIOS===		===Turn off CPU power saving in the BIOS===

@@ Line 356: / Line 356: @@
 ===Upgrade BIOS===
 On a ThinkPad {{X60s}}, [[BIOS_Upgrade|upgrading the BIOS]] to version 1.06 eliminated the high pitch noise when running on battery.
-On a ThinkPad {{X61}}, [[BIOS_Upgrade|upgrading the BIOS]] to version 2.21 reduces the noise. It's not completely eliminated, though.
 On a ThinkPad {{R60}}, [[BIOS_Upgrade|upgrading the BIOS]] to version 2.19 eliminated the voice also.

@@ Line 92: / Line 92: @@
 High-pitched crackling noise.
 | style="vertical-align:top;" |
 *{{X41}}
 *{{T43}}

← Older revision		Revision as of 19:49, 5 September 2010
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	*Stefan Ott: On my X41, the noise seems to have stopped since I enabled "USB selective suspend/resume and wakeup" (CONFIG_USB_SUSPEND).		*Stefan Ott: On my X41, the noise seems to have stopped since I enabled "USB selective suspend/resume and wakeup" (CONFIG_USB_SUSPEND).
	*babrodtk: This approach worked with an R60 as well.		*babrodtk: This approach worked with an R60 as well.
		+
		+	===Turn off fan===
		+	On a ThinkPad {{T60p}}, changing the fan speed or turning off the fan using TP Fan Control eliminated the high pitch noise.

@@ Line 175: / Line 175: @@
 *{{X60_Tablet}}
 **6366-4DU
 |}

@@ Line 186: / Line 186: @@
 * '''Hard disk:''' On some ThinkPads the processor and hard disk are adjacent and produce similar noise. For example, in the {{X41}} the sound generated by the hard disk is likely to be loudest at the vent.
 * '''Gigabit Ethernet processor:''' In some models (e.g., {{T43}}) high ethernet activity causes a high pitch noise.
 * '''Screen brightness:''' on an {{X31}}, a hissing sound is started whenever screen brightness is not full.
 ==Status==