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Thread: Why CentOS is reading one key press as held down key press?

  1. #1
    Join Date
    Apr 2011
    Posts
    62

    Why CentOS is reading one key press as held down key press?

    I have installed CentOS on the computer of mine. I have noticed a particular problem with the computer of mine. Sometimes I have noticed when I press M from the keyboard it seems to be typing ‘hhhhhhhhh’. I am unable to figure out whether there is an hardware issue or software issue on the computer of mine. Let me know if you are knowing anything which I can use to fix the problem of mine. Any help would be highly appreciated. Thanks a lot in advance

  2. #2
    Join Date
    May 2008
    Posts
    859

    Re: Why CentOS is reading one key press as held down key press?

    Looking at the problem which you have mentioned over here it hard to figure out the root cause of the problem. Can you tell me which version of the CentOS do you have installed on the computer? Let me know which keyboard brand do you using? Do you having PS2 or USB keyboard? Can you tell me about the hardware configuration of the computer? Do you have updated all the drivers on the computer? Let me know the answers of the above mentioned question as early as possible.

  3. #3
    Join Date
    May 2008
    Posts
    962

    Re: Why CentOS is reading one key press as held down key press?

    I am highly suspecting that the problem which you have mentioned over here is happening due to clock issue. Hence I am suggesting that you should change the clocksource acpi_pm and it can make the clock speed faster. In order to check the current clock source you can use the following command on the terminal.
    Code:
    # cat /sys/devices/system/clocksource/clocksource0/available_clocksource 
    tsc acpi_pm 
    # cat /sys/devices/system/clocksource/clocksource0/current_clocksource
    tsc
    Also you should put clocksource=acpi_pm into /boot/grub/menu.lst.

  4. #4
    Join Date
    May 2008
    Posts
    991

    Re: Why CentOS is reading one key press as held down key press?

    Let me know whether you are typing through the command line or GUI. If you are using GUI then I am suggesting that you should try with adjusting repeat speed. You should go for System and then go for Preferences and then go for Keyboard. Here you will get the option for the adjusting the speed of the keyboard on the computer of yours. So go through the steps which I have mentioned over here and let me know about the results.

  5. #5
    Join Date
    May 2008
    Posts
    1,020

    Re: Why CentOS is reading one key press as held down key press?

    In order to change the keyboard repeat rate you need to use the following command and see whether it is working or not.
    Code:
    ! set the keyboard repeat rate to the max
    
             mov     ax,#0x0305
             xor     bx,bx           ! clear bx
             int     0x16
    you should paste the above mentioned command into /usr/src/linux/[arch/i386/]boot/setup.s. So try the above mentioned thing and I am hoping that it will help you out.

  6. #6
    Join Date
    Nov 2009
    Posts
    824

    Re: Why CentOS is reading one key press as held down key press?

    I think the problem which you have mentioned over here is happening due to driver issue. So I am suggesting that you should go for the official website of the keyboard manufacturer and look for the latest version of the keyboard driver. You should download and install the drivers on the computer. After installing the drivers you should reboot the computer of yours.

  7. #7
    Join Date
    Apr 2009
    Posts
    1,107

    Re: Why CentOS is reading one key press as held down key press?

    Do you have tried with any other keyboard? Well it will help you out to figure out whether there is an issue with the keyboard or computer? If other keyboard is working then I am sure that there is an issue with the keyboard which you are using currently. You are having two options that is you can claim for the replacement warranty if you are having with you or you can get the brand new keyboard from the market.

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