Piszczacy Monitor :)

80.51.100.* napisał:

Od momentu kiedy mam net w lapku , dziwne ale taka jest prawda - slyszcze takie dziwne piszczenie.
A najczesciej jak wlacze jakis komunikator typu GG głownie wtedy to slychac bardzo.
Jest to denerwujace co to oznacza??
dzieki za rady

83.26.17.* napisał:

pewnie kondensator mam podobny problem z FSC amilo m7440g w postaci pisków, od miesiaca nie mam kompa jest w serwisie i nie chca naprawic:( zobacz tutaj http://forum./index.php?showtopic=184684&hl=m7440g

85.198.231.* napisał:

Halas wysokiej czestotliwosci pochodzi prawdopodobnie z wadliwej:
- przetwornicy DC/DC buck skalujacej napiecie zasilania procesora
- inwertera CCFL matrycy (DC/AC)

konkretnie rezonuja zwoje na cewce lub/i rdzen.

Inna przyczyna to problem z zaawansowanym zarzadzaniem energia laptopa APCI (APM):
http://forums.gentoo.org/viewtopic-t-9754-highlight-.html

"This is a problem with APM, specifically the make CPU idle calls option. Whats happening is when the CPU is idle it throttles the CPU. At high CPU usage there is little throttling so the noise is less noticable. When on battery the CPU is already throttled to a lower state full time and the APM throttling feature may not be used. Solution is to disable this in the kernel. The only APM feature I use on my I4000 is console blanking. The rest of your APM features can be set via the bios, which actually work in linux as opposed to being overrided in wondows."

"ACPI and High Pitch Noise
From time to time, the laptop emits a low-volume very high pitch noise. According to the ThinkWiki site, this is related to the powersaving states C3 and C4, which are activated by the ACPI module "processor" when the system is idle. Using the max_cstate parameter, you can avoid the C3 and C4 states and thus resolve the high pitch noise problem. If the processor module is compiled into the kernel, add the following to your boot command line:

processor.max_cstate=2
If processor is compiled as a module, do the following:

echo "options processor max_cstate=2" >> /etc/modutils/acpi
update-modules
Since this disables two powersaving states in the CPU, I guess that this change also somehow affects the battery life."

"I believe the noise has something to do with the voltage of the processor. I am not sure why or how, yet after I reduced the voltage to 0.700V at 800 MHz clock speed (with Centrino Hardware Control, a must have tool) the noise died away."

Radze przeprowadzic maly test - zainstalowac lub uruchomic Linux bootowalnego z plyty Live CD (Live DVD) np Ubuntu - czy bedziecie miec nadal to zjawisko.
Najlepiej, aby posiadal minimum Kernel 2.6.14, w ktorym czestotliwosc "Timer frequency" ustawiona jest na 250 Hz zamiast 1 kHz - eliminuje to podobno dzwiek wysokiej czestotliwosci calkowicie.

Problem dotyczy wiekszosci notebookow i to nie jest tak, ze jedna firma spartolila sprawe - wystarczy wpisac "high pitch noise" i co widze: HP, IBM, Dell, Toshiba itd

Tutaj lista IBMow:
http://www.thinkwiki.org/wiki/Problem_with_high_pitch_noises

http://thinkwiki.org/wiki?title=Talk:Problem_with_high_pitch_noises

Tutaj ten sam problem na forum HP:
http://forums1.itrc.hp.com/service/forums/parseCurl.do?CURL=%2Fcm%2FQuestionAnswer%2F1%2C%2C0x7b57c1c4ceddd61190050090279cd0f9%2C00.html&admit=-682735245+1140560819069+28353475

Work-Around For High Pitch Noise on NX8220: http://forum.notebookreview.com/showthread.php?t=16307

Toshiba M45-351 high pitch noise, PLEASE HELP: http://forum.notebookreview.com/showthread.php?t=11518


Windows XP and Advanced Power Management (APM) Support:
http://support.microsoft.com/?kbid=307525

How Windows XP Determines ACPI Compatibility:
http://support.microsoft.com/?kbid=314088

ACPI FAQ:
http://developer.intel.com/technology/iapc/acpi/faq.htm

80.51.100.* napisał:

ja mam ibm T23
ps.mozna to jakos ustawic softwarowo??

//edit

pod mandriva 2006 problem znikł, pod winda - włączam komunikator aqq i piszczy ze szok ,moze to win akomunikatora??

85.198.231.* napisał:

No i jest potwierdzenie problemu - dziekujemy firmie Microsoft za udana obsluge ACPI (APM) w systemie Windows

83.6.102.* napisał:

Nie sądzisz że takie stwierdzenie to przesada? Przecież problem występuje na dość małej liczbie komputerów, czyli u większości wszystko działa ok., mimo iż komputery pracują pod kontrolą windows’a.

85.198.231.* napisał:

Większość albo ma to zjawisko zminimalizowane, albo nie przykłada do tego wagi. Skala problemu - "high pitch sound" lub "fiepsen" jest jednak duża.

80.51.100.* napisał:

w takim razie czy w rejestrze da sie cos zmienic aby temu zaradzic?

85.198.231.* napisał:

Skoro da sie zmodyfikowac ustawienia jadra w Linuxie to pod Windowsem powinno dac sie zmienic ustawienia w rejestrze jak wspomniales - przynajmniej teoretycznie. Czesciowo za obsluge ACPI 2.0 odpowiada takze BIOS - na stronie FSC w przypadku najnowszego BIOSu do modelu M7440G mozna napotkac wzmianke o redukcji tego zjawiska. Narazie dokopalem sie do dokumentacji ACPI i kodu źródłowego. Obecnie lapy wykorzystuja ACPI 2.0, a starsze modele APM. Najlepsze jest to, ze Windows XP obsluguje tylko czesc mozliwosci ACPI 2.0 :/

"CPU activity: On some models the noise is triggered by certain CPU power states or activity patterns:

The problem is highly specific to operating system, model and even individual machines. There is no universal solution, but on most machines one of the following will reduce or eliminate the noise (possibly at some cost in power consumption).

Solutions for CPU-triggered noise:
- Limit ACPI CPU power states
- Turn off CPU power saving in in BIOS
- Disable ACPI CPU power states
- Change the timer interrupt frequency
- Prevent idling
- Change the processor voltage

Other solutions:
- Disable UltraBay
- Disable IrDA
- Disable Modem
- Media Player paused"

"Acutally, I've responded to previous posts by other users with a similar problem with different brands. It turns out that the Pentium M based notebooks (some) seem to emit this annoying high pitched noise. It also happened on an HP NX7000 I used to have over a year ago. I was in contact with one of HP's engineers and the problem was found to be a capacitor or resistor that was causing the noise. Their solution was to put some glue over the cap/res causing the problem. I don't know exactly what has happened with the problem since I have already returned my notebook.

Another way for the sound to disappear is to set your power management setting to Notebook/Laptop or any of the other settings. If set to Always On, the sound comes back. Plugging devices into the USB ports will also eliminate the noise as you have already discovered. Another thing to try is to disable power management for the USB ports in device manager. A user posted this as a possible workaround, but I couldn't try it since I already returned my notebook.

Here's a work-around that seems to have eliminated the noise on my HP NX8220.

1. Goto Device Manager -> USB Controllers
2. Goto each of the USB Root Hubs -> Power Management Tab
3. Uncheck "Allow The Computer To Turn Off This Device To Save Power"

After I did this, the sound disappeared completely even when I change the system Power Management setting to Always On."

Co do Twojego lapka to srubokret w dlon i pistolet klejacy:
http://www.elektroda.pl/rtvforum/viewtopic.php?t=186046&highlight=piszczenie&sid=4ee734fc12a5dd4c513b0535f7a3e2e5

http://www.elektroda.pl/rtvforum/viewtopic.php?t=408441&highlight=piszczenie&sid=1b78ec6bf41c1432aa9a0eaab3c18e69

http://www.elektroda.pl/rtvforum/viewtopic.php?t=126257&highlight=piszczenie&sid=1b78ec6bf41c1432aa9a0eaab3c18e69

80.51.100.* napisał:

dzieki ,ale zauwazylem ze ten pisk nie jest chyba wina monitora, po jego wylaczeniu w moim przypadku "Fn+F7" dzwiek nadal jest i to mnie bardzo wkurza!!!

85.198.231.* napisał:

Rozkrec lapka i znajdz winowajce.

00 01 02 03 04 05 06 07 08 09