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On 07/13/2011 01:33 AM, Grant wrote: |
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>>>> When I was using an Nvidia video card, I noticed a strange sort of |
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>>>> fuzzy edge effect if I used nvidia-drivers. xf86-video-nouveau didn't |
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>>>> have the same problem. Now I've switched to an ATI video card and |
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>>>> unfortunately I have the same problem with xf86-video-ati. I tried to |
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>>>> enable the new modesetting radeon driver in the kernel to see if that |
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>>>> would help but it doesn't work with my HD4250 card yet. Does anyone |
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>>>> know how to fix this? Here's a photo of the effect around the mouse |
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>>>> cursor: |
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>>>> |
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>>>> http://imageshack.us/photo/my-images/804/cursor.jpg |
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>>>> |
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>>>> - Grant |
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>>>> |
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>>> |
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>>> Hi Grant, |
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>>> |
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>>> just a shot in the dark: |
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>>> The image looks to me as thos would be an analog instead of |
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>>> an digital problem. |
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>>> May be both propietary drivers switch to the highest possible |
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>>> data transfer rate and this triggers the problem. |
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>>> To check, whether this may be the problem: |
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>>> Instruct the driver to use either low resolution or low refresh |
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>>> rates. Check both. |
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>>> If the problem changes signifiently: Change the cables. |
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>>> May be only a pluf is not inserted correctly. |
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>>> Addtionally you can move the cables arround to see whether |
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>>> this will change the shadows around the cursor in any way... |
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>>> |
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>>> Good luck! :) |
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>>> Best regards |
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>>> mcc |
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>> |
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>> Thanks for that. I'm still working on it but adding radeon.audio=0 to |
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>> grub cleaned it up about 75%. |
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>> |
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>> - Grant |
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> |
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> It turns out the radeon.audio=0 setting disables HDMI data packets and |
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> puts the HDMI port in DVI mode. mcc, I'm starting to think you had it |
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> pretty right on. I've tried two different cables with the same result |
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> but I'm thinking this may be some sort of electrical interference |
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> issue. |
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|
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HDMI is digital, so there can be no interference. This looks more like |
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a driver bug. |
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|
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Btw, why are you connecting to your monitor with HDMI? For computer |
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monitors, you use the DVI port, not HDMI. HDMI is for TVs. Unless of |
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course your monitor lacks a digital DVI port (DVI-I or DVI-D). If it |
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only has a DVI-A port, only then is HDMI the better solution. |
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