** Changed in: xserver-xorg-video-intel
Status: Confirmed => Fix Released
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Title:
[gm45] X crash on X200s with
commit 1b94fd77792310c80b0a2bcf4bf6d4e4c4c23bca
Author: Alex Orange
Date: Fri Oct 3 15:41:38 2014 -0600
fb: Fix Bresenham algorithms for commonly used small segments.
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This bug still occurs with Kicad and recent X11
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Title:
[gm45] X crash on X200s with dual monitors (using DisplayPort)
** Changed in: xserver-xorg-video-intel
Status: Fix Released = Confirmed
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Title:
[gm45] X crash on X200s with
This has caused a regression:
https://bugs.freedesktop.org/show_bug.cgi?id=54168
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Title:
[gm45] X crash on X200s with
** Bug watch added: freedesktop.org Bugzilla #54168
https://bugs.freedesktop.org/show_bug.cgi?id=54168
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Title:
[gm45]
Committed as
http://cgit.freedesktop.org/xorg/xserver/commit/?id=863d528a9f76d0e8f122aebf19f8564a4c67a938
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Title:
[gm45]
** Changed in: xserver-xorg-video-intel
Status: Confirmed = Fix Released
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Title:
[gm45] X crash on X200s with
I am getting this crash when doing zone fills in KiCad. Fedora 16,
unaccelerated video. I have applied Simon Schubert's patch, and the
crashes no longer happen.
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Created attachment 59095
A backtrace of a crash caused by this problem
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Title:
[gm45] X crash on X200s with dual
Created attachment 57155
reorder Bresenham error correction to avoid overshoot.
When fbBresSolid draws a line, it can happen that after the last
pixel, the Bresenham error term overflows, and fbBresSolid paints
another pixel before adjusting the error term.
However, if this happens on the last
We're closing this bug since it is has been some time with no response
from the original bug reporter. However, if the issue still exists in
the latest development version of Ubuntu and you are the original
reporter please feel free to reopen with the requested information. If
you are not the
Created attachment 56113
gdb backtrace
gdb backtrace of the bug. dst is out of bounds. I can provide core
file and binaries if required.
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The problem seems to be that there are negative coordinates being passed
in to ProcPolySegment:
(gdb) p/x *(xSegment*)((xPolySegmentReq *)0x2918e1c)[1]
$11 = {x1 = 0x24, y1 = 0x10, x2 = 0xfffe, y2 = 0x}
I don't know who is supposed to catch
Clipping is performed in fbSegment(), see OUTCODES() and
miZeroClipLine().
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Title:
[gm45] X crash on X200s with dual
Ah. I believe this is the problem, or at least very closely related:
http://cgit.freedesktop.org/xorg/xserver/tree/fb/fbseg.c#n693:
if (clip2 != 0 || drawLast)
len++;
in combination with these variables:
new_x1 = 36
new_x2 = 0
new_y1 = 16
Ok, I see what is going on there.
The len++ is to make the end coordinates inclusive, which they should be
if drawLast is set, or if we clipped the end.
Now, we changed the end coordinates, but we keep the Bresenham error
terms, because we want the same angle (I suppose).
However, if we look at
Just a follow-up to say that solution (d) seems to work for me.
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Title:
[gm45] X crash on X200s with dual monitors
I cannot reproduce this with 1.9.5, and judging by the date of this bug
I assume it can be closed, right?
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Title:
[gm45]
I experience a related bug when using KiCad:
[ 2507.868]
Backtrace:
[ 2507.868] 0: /usr/bin/X (xorg_backtrace+0x26) [0x566a86]
[ 2507.868] 1: /usr/bin/X (0x40+0x16a6e9) [0x56a6e9]
[ 2507.868] 2: /lib/libpthread.so.0 (0x7fa9d12c8000+0xf8a0) [0x7fa9d12d78a0]
[ 2507.868] 3:
This bug report was filed against an old version of Ubuntu.
Can you confirm whether this is still an issue in natty?
Please also ensure this bug has tags for each Ubuntu release
that the bug is confirmed as affecting.
** Changed in: xserver-xorg-video-intel (Ubuntu)
Status: Confirmed =
** Changed in: xserver-xorg-video-intel
Importance: Unknown = High
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Title:
[gm45] X crash on X200s with dual monitors
** Changed in: xserver-xorg-video-intel
Importance: High = Unknown
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Title:
[gm45] X crash on X200s with dual monitors
** Summary changed:
- [gm45] X crash on X200s with dual monitors (using DisplayPort)
+ [g45] [gm45] X crash on X200s with dual monitors (using DisplayPort)
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[g45] [gm45] X crash on X200s with dual monitors (using DisplayPort)
https://bugs.launchpad.net/bugs/416421
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** Summary changed:
- [g45] [gm45] X crash on X200s with dual monitors (using DisplayPort)
+ [gm45] X crash on X200s with dual monitors (using DisplayPort)
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[gm45] X crash on X200s with dual monitors (using DisplayPort)
https://bugs.launchpad.net/bugs/416421
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** Summary changed:
- X crash on X200s with dual monitors (using DisplayPort)
+ [gm45] X crash on X200s with dual monitors (using DisplayPort)
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[gm45] X crash on X200s with dual monitors (using DisplayPort)
https://bugs.launchpad.net/bugs/416421
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This bug has similar backtrace as bug 415357 (which is easy to reproduce
at least), therefore I have added upstream bug to watchlist.
** Bug watch added: freedesktop.org Bugzilla #24274
https://bugs.freedesktop.org/show_bug.cgi?id=24274
** Also affects: xserver-xorg-video-intel via
** Tags added: kubuntu
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X crash on X200s with dual monitors (using DisplayPort)
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Public bug reported:
Binary package hint: xserver-xorg-video-intel
Up-to-date Kubuntu Karmic. Not using Desktop Effects (compositing).
I have ThinkPad X200s with X4500 graphics. I am using it in dual monitor
setup with HP L2045w connected over DVI-DisplayPort. I use the following
xrandr command
** Attachment added: BootDmesg.txt
http://launchpadlibrarian.net/30574674/BootDmesg.txt
** Attachment added: CurrentDmesg.txt
http://launchpadlibrarian.net/30574675/CurrentDmesg.txt
** Attachment added: Dependencies.txt
http://launchpadlibrarian.net/30574676/Dependencies.txt
**
Note: I have to use xrandr command, as by default I do not get native
monitor resolution displayed - see bug 286001
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X crash on X200s with dual monitors (using DisplayPort)
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** Tags added: crash gm45 karmic
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X crash on X200s with dual monitors (using DisplayPort)
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** Changed in: xserver-xorg-video-intel (Ubuntu)
Status: New = Confirmed
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X crash on X200s with dual monitors (using DisplayPort)
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