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Setup:
Hardware:
- A relic with an ATI RV530 GL in it
Software:
- I only know of xf86-video-ati. If there's another compatible driver let me know.
- I've tried x + lxde + lxdm + i3 and wayland + gnome + gdm + sway, to similar results.
Complaint:
- When I got my display to start, the lines were being output a few pixels too wide, resulting in diagonal splotches for a display instead of a coherent image. The mouse cursor was unaffected, only static objects were misrendered.
Attempted Diagnosis:
- I was able to confirm that a live CD of Linux Mint (Cinnamon Interface) was able to render proper imagery on my monitor.
- I checked the output of
xrandr
on Linux Mint, and compared it to the output of
DISPLAY=":0" xrandr
Working xrandr output (Linux Mint Cinnamon):
Screen 0: minimum 320 x 200, current 1680 x 1050, maximum 8192 x 8192
DVI-0 connected primary 1680x1050+0+0 (normal left inverted right x axis y axis) 434mm x 270mm
1680x1050 59.9*+
1280x1024 75.0 60.0
1152x864 75.0
1024x768 75.1 60.0
800x600 75.0 60.3
640x480 75.0 60.0
720x400 70.1
DVI-1 disconnected (normal left inverted right x axis y axis)
Unusable xrandr output (Arch Linux x86_64):
Screen 0: minimum 320 x 200, current 1680 x 1050, maximum 8192 x 8192
XWAYLAND0 connected 1680x1050+0+0 (normal left inverted right x axis y axis) 430mm x 270mm
1680x1050 59.85*+
Possible Cause:
- The frequency output by Arch is slightly lower than the frequency output by Mint.
- I'm not sure how monitor signals work, but it's possible that the monitor is expecting an RGB to update 59.9 x NUM_PIXELS times per second, and that ARCH is updating it 59.85 x NUM_PIXELS times per second, resulting in duplicate pixels in each row, causing them to overflow to the next row.
Attempted Correction:
- I ran
DISPLAY=":0" xrandr -r 59.9.
Rate 59.90 Hz not available for this size
Do you think my diagnosis is correct? Why or why not?
What information might I need to solve this problem?
What else can I do to try to set the refresh rate?
Your assistance is appreciated.
Last edited by anonwithaquestion (2018-09-30 20:12:44)
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Please use code tags when pasting to the boards: https://wiki.archlinux.org/index.php/Co … s_and_code
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Please use code tags when pasting to the boards: https://wiki.archlinux.org/index.php/Co … s_and_code
Apologies.
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If you want to compare behaviour on xorg then compare behaviour on xorg. Wayland is a whole other ballpark. Start a proper xorg session and check back.
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