| 2011-08-28 03:51:13 |
Kevin Atkinson |
bug |
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added bug |
| 2011-08-28 03:51:13 |
Kevin Atkinson |
attachment added |
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Patch to fix truncating of pixel clock freq. https://bugs.launchpad.net/bugs/835817/+attachment/2324810/+files/xrandr.patch |
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| 2011-08-29 01:10:47 |
Dave Gilbert |
bug |
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added subscriber Dave Gilbert |
| 2011-11-06 14:40:07 |
Dave Gilbert |
x11-xserver-utils (Ubuntu): importance |
Undecided |
Medium |
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| 2011-11-06 14:40:07 |
Dave Gilbert |
x11-xserver-utils (Ubuntu): status |
New |
Triaged |
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| 2011-11-06 15:10:42 |
Dave Gilbert |
nominated for series |
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Ubuntu Lucid |
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| 2011-11-06 15:16:08 |
Alessandro Menti |
tags |
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patch-accepted-upstream |
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| 2011-11-06 15:19:22 |
Dave Gilbert |
description |
In Ubuntu 10.04 when adding new modes using "--newmode" the pixel clock is truncated, for example 119.9 will become 119. This is due to check_strtod in xrandr.c returning an int when it should be returning in double. This bug is already fixed upstream. Please consider adding the following patch to either -updates or -backports, which every is more appropriate.
Thank You. |
In Ubuntu 10.04 when adding new modes using "--newmode" the pixel clock is truncated, for example 119.9 will become 119. This is due to check_strtod in xrandr.c returning an int when it should be returning in double. This bug is already fixed upstream. Please consider adding the following patch to either -updates or -backports, which every is more appropriate.
Thank You.
[IMPACT] Unable to get the required pixel clock and hence potential for difficulty in getting some video systems to operate correctly. Probably fairly rare.
[Development Fix] It's working in current development versions, but hasn't been explicitly tracked.
[Stable Fix] Original reporter reports that the patch at http://cgit.freedesktop.org/xorg/app/xrandr/commit/?id=27f86db064a5ea60b942fd3d3ddeb462d980df9b is the required fix.
[Test Case] From comment #3:"It's easy to reproduce, for example:
xrandr --newmode "640x480_75.00" 30.75 640 664 728 816 480 483 487 504 -hsync +vsync"
xrandr
The output will be:
...
640x480_75.00 (0x115) 30.0MHz
h: width 640 start 664 end 728 total 816 skew 0 clock 36.8KHz
v: height 480 start 483 end 487 total 504 clock 72.9Hz
Notice how the pixel clock freq. was truncated to 30.00 and the refresh rate is 72.9 instead of 75.0 like it should be."
[Regression Potential] Apparently small; although one has to worry about changing something like xrandr. |
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| 2011-12-09 23:58:57 |
Bryce Harrington |
summary |
xrandr client truncates pixel clock freq. |
xrandr client truncates pixel clock freq. [Lucid] |
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| 2012-02-08 22:33:13 |
Bryce Harrington |
tags |
patch-accepted-upstream |
lucid patch-accepted-upstream |
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| 2012-05-18 03:32:06 |
Bryce Harrington |
bug task added |
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x11-xserver-utils (Ubuntu Lucid) |
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| 2015-06-17 12:17:26 |
Rolf Leggewie |
x11-xserver-utils (Ubuntu Lucid): status |
New |
Won't Fix |
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