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TICKET ARCHIVE -> Stripes On Dual Head Displays
jaz_mm - Nov 15, 2005 - 11:55 am
Anyone seen this behaviour?
I have a dual head on a power mac G5 - in fact I have two such machines and both have the same 'feature'.
Some applications use 'striping' to highlight alternate lines of text (e.g. Navicat, Path Finder) and many windows use the pin striping effect in the window header bar.
On one display the striping displays fine, on the other it is missing. If you use grab then the 'grab' image shows the stripes. If you switch the display connectors over, the presence or absence of striping is determined by the DVI port the display is connected to.
If the striping is set to a color other than blue (if you are using the Aqua desktop) then only the blue part is removed and the stripe appears on the display in the color minus the blue portion.
If you mess around with the opacity of the stripe (Path Finder lets you do that) then you can get blue stripes on the display provided the opacity does not match some magic value.
Weird behaviour - looks like some kind of fault in the display driver or OpenGL engine?. Is it just my two machines or can someone else reproduce this. My machines both have ATI Radeon 9650 display adapters so maybe its down to that.
I can find no reference from anyone else to this effect so I was beginning to wonder if it was me!
I have a dual head on a power mac G5 - in fact I have two such machines and both have the same 'feature'.
Some applications use 'striping' to highlight alternate lines of text (e.g. Navicat, Path Finder) and many windows use the pin striping effect in the window header bar.
On one display the striping displays fine, on the other it is missing. If you use grab then the 'grab' image shows the stripes. If you switch the display connectors over, the presence or absence of striping is determined by the DVI port the display is connected to.
If the striping is set to a color other than blue (if you are using the Aqua desktop) then only the blue part is removed and the stripe appears on the display in the color minus the blue portion.
If you mess around with the opacity of the stripe (Path Finder lets you do that) then you can get blue stripes on the display provided the opacity does not match some magic value.
Weird behaviour - looks like some kind of fault in the display driver or OpenGL engine?. Is it just my two machines or can someone else reproduce this. My machines both have ATI Radeon 9650 display adapters so maybe its down to that.
I can find no reference from anyone else to this effect so I was beginning to wonder if it was me!
jaz_mm - Nov 16, 2005 - 6:05 am
More information:
This only occurs on my machines with G5 processors and ATI Radeon adapters - I have another machine (QuickSilver) with and nVidia adapter and both heads stripe correctly.
All machines are running Tiger 10.4.3, but the problem has existed since the machines were new. One shipped with 10.3 and was upgraded, one shipped with 10.4 Server.
Its only recently started to annoy me because I am using Navicat to look at sets of data and the lack of stripes makes reading across rows difficult.
This only occurs on my machines with G5 processors and ATI Radeon adapters - I have another machine (QuickSilver) with and nVidia adapter and both heads stripe correctly.
All machines are running Tiger 10.4.3, but the problem has existed since the machines were new. One shipped with 10.3 and was upgraded, one shipped with 10.4 Server.
Its only recently started to annoy me because I am using Navicat to look at sets of data and the lack of stripes makes reading across rows difficult.
TechSupport - Nov 19, 2005 - 6:30 am
This ticket has been moved to the open forums for more exposure.
Please follow this link:
http://www.macosx.com/forums/showthread.php?t=261198
Please follow this link:
http://www.macosx.com/forums/showthread.php?t=261198
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