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Thread: White stream of pixels on screen

  1. #1
    Join Date
    Aug 2009
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    Ubuntu 9.10 Karmic Koala

    Cool White stream of pixels on screen

    Ever since the installation screen of Ubuntu my laptop (new as of yesterday) has had a thin white column of pixels slightly off to the right of the middle of the screen and another on the far left. I also have Windows Vista installed (not my fault), and the problem is not present when I boot that. The problem is not impeding the performance or function of my computer, but it's annoying.
    Last edited by Karlossantos; August 6th, 2009 at 12:01 AM. Reason: Spelling

  2. #2
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    Re: White stream of pixels on screen

    I know you're all probably the 'strong silent type', but a little help would be great right about now. I'm using a HP Pavillion DV7.

  3. #3
    Join Date
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    Ubuntu 9.04 Jaunty Jackalope

    Re: White stream of pixels on screen

    Can you post a screenshot?
    T.I.S.M

  4. #4
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    Re: White stream of pixels on screen

    It seems the dots are phantoms; they don't appear when your trying to take a screenshot of them. I will try to simulate the effect. Keep in mind that these dots are constantly skittering up and down their little column.


  5. #5
    Join Date
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    Re: White stream of pixels on screen

    Beats me! Are you sure it is not the wallpaper? Try changing it. And even if you are sure it's not the wallpaper try using a light coloured wallpaper. Since the stream is but near invisible over the task bar which has light colours. I think the change will do the trick.

  6. #6

    Re: White stream of pixels on screen

    Sounds like it could be a graphics card output problem — I had something similar on Windows when my old card developed a hardware fault.

    What driver are you using (it's nVidia integrated graphics, right)? Does changing the driver, resolution or refresh rate make a difference?

  7. #7
    Join Date
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    Ubuntu 12.04 Precise Pangolin

    Re: White stream of pixels on screen

    Quote Originally Posted by Karlossantos View Post
    I know you're all probably the 'strong silent type', but a little help would be great right about now. I'm using a HP Pavillion DV7.
    That was quite funny

    Let's verify that the drivers are installed correctly. Please post the output of
    Code:
    glxinfo | grep direct
    Also, so we can see what card you have and other hardware also post the output of
    Code:
    lspci

  8. #8
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    Re: White stream of pixels on screen

    glxinfo | grep direct:
    unknown chip id 0x9612, can't guess.
    direct rendering: Yes


    lspci:
    00:00.0 Host bridge: Advanced Micro Devices [AMD] RS780 Host Bridge
    00:01.0 PCI bridge: Hewlett-Packard Company Device 9602
    00:04.0 PCI bridge: Advanced Micro Devices [AMD] RS780 PCI to PCI bridge (PCIE port 0)
    00:05.0 PCI bridge: Advanced Micro Devices [AMD] RS780 PCI to PCI bridge (PCIE port 1)
    00:06.0 PCI bridge: Advanced Micro Devices [AMD] RS780 PCI to PCI bridge (PCIE port 2)
    00:07.0 PCI bridge: Advanced Micro Devices [AMD] RS780 PCI to PCI bridge (PCIE port 3)
    00:11.0 SATA controller: ATI Technologies Inc SB700/SB800 SATA Controller [AHCI mode]
    00:12.0 USB Controller: ATI Technologies Inc SB700/SB800 USB OHCI0 Controller
    00:12.1 USB Controller: ATI Technologies Inc SB700 USB OHCI1 Controller
    00:12.2 USB Controller: ATI Technologies Inc SB700/SB800 USB EHCI Controller
    00:13.0 USB Controller: ATI Technologies Inc SB700/SB800 USB OHCI0 Controller
    00:13.1 USB Controller: ATI Technologies Inc SB700 USB OHCI1 Controller
    00:13.2 USB Controller: ATI Technologies Inc SB700/SB800 USB EHCI Controller
    00:14.0 SMBus: ATI Technologies Inc SBx00 SMBus Controller (rev 3a)
    00:14.1 IDE interface: ATI Technologies Inc SB700/SB800 IDE Controller
    00:14.2 Audio device: ATI Technologies Inc SBx00 Azalia (Intel HDA)
    00:14.3 ISA bridge: ATI Technologies Inc SB700/SB800 LPC host controller
    00:14.4 PCI bridge: ATI Technologies Inc SBx00 PCI to PCI Bridge
    00:18.0 Host bridge: Advanced Micro Devices [AMD] Family 11h HyperTransport Configuration (rev 40)
    00:18.1 Host bridge: Advanced Micro Devices [AMD] Family 11h Address Map
    00:18.2 Host bridge: Advanced Micro Devices [AMD] Family 11h DRAM Controller
    00:18.3 Host bridge: Advanced Micro Devices [AMD] Family 11h Miscellaneous Control
    00:18.4 Host bridge: Advanced Micro Devices [AMD] Family 11h Link Control
    01:05.0 VGA compatible controller: ATI Technologies Inc RS780M/RS780MN [Radeon HD 3200 Graphics]
    01:05.1 Audio device: ATI Technologies Inc RS780 Azalia controller
    08:00.0 System peripheral: JMicron Technologies, Inc. SD/MMC Host Controller
    08:00.2 SD Host controller: JMicron Technologies, Inc. Standard SD Host Controller
    08:00.3 System peripheral: JMicron Technologies, Inc. MS Host Controller
    08:00.4 System peripheral: JMicron Technologies, Inc. xD Host Controller
    09:00.0 Ethernet controller: Atheros Communications Inc. AR242x 802.11abg Wireless PCI Express Adapter (rev 01)
    0a:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller (rev 02)

  9. #9
    Join Date
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    Ubuntu 12.04 Precise Pangolin

    Re: White stream of pixels on screen

    [QUOTE=Karlossantos;7756254]glxinfo | grep direct:
    unknown chip id 0x9612, can't guess.
    direct rendering: Yes


    Unknown chip. Though the answer Yes is good
    All right so, we should reinstall the driver for your Radeon 3200.
    Follow this to install the drivers. Download them from here and just choose what you have. Let us know if you get it working or need any more help with it. Also what method did you use to install the drivers originally.

  10. #10
    Join Date
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    Re: White stream of pixels on screen

    Huzzah! Success! The driver installation worked. Thanks Thisislaw and everyone else who took the time to help.

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