[Bug 985202] Re: libx11 causes kwin to crash on login (over NX protocol)

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------------------------------------------------------------------------
On 2013-01-24T10:15:31+00:00 Ritesh Khadgaray wrote:

Created attachment 73555
proposed patch

kwin crashes on xrandr event .

from src/Xrandr.c
    switch (event->type - info->codes->first_event) {
    case RRScreenChangeNotify:
        scevent = (XRRScreenChangeNotifyEvent *) event;
        snum = XRRRootToScreen(dpy,
                               ((XRRScreenChangeNotifyEvent *) event)->root);
<--- snum is returned as -1 here on nx server
        if (scevent->rotation & (RR_Rotate_90 | RR_Rotate_270)) {
                dpy->screens[snum].width = scevent->height;

reference:
https://bugs.launchpad.net/ubuntu/+source/libxfixes/+bug/985202

Reply at:
https://bugs.launchpad.net/ubuntu/+source/libxrandr/+bug/985202/comments/48


** Changed in: xorg-server
       Status: Unknown => Confirmed

** Changed in: xorg-server
   Importance: Unknown => Medium

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https://bugs.launchpad.net/bugs/985202

Title:
  libx11 causes kwin to crash on login (over NX protocol)

Status in X.Org X server:
  Confirmed
Status in “libxrandr” package in Ubuntu:
  Confirmed

Bug description:
  This behavior is 100% reproducible. I have freenx-server installed from here:
  https://launchpad.net/~freenx-team/+archive/ppa

  And am logging in from a remote machine with the newest nxclient from
  nomachine.org. What happens is that upon login or shortly thereafter,
  kwin crashes with a segfault. After restarting, it crashes at regular
  intervals as well.

  I reported a bug to the KDE4 tracker:
  https://bugs.kde.org/show_bug.cgi?id=298370

  And it was marked a duplicate of a bug NOT related to NX:
  https://bugs.kde.org/show_bug.cgi?id=293209

  Judging from the backtrace, and from the comments in bug 293209, the
  problem is related to Xorg, and the people at KDE seem to think that
  the problem might even be Ubuntu 12.04 specific. So I decided to re-
  report the bug here and give you pointers to the relevant KDE
  bugreports.

  We are really desperate to get Kwin working under NX and are willing
  to test whatever you like!

  Many thanks in advance.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: libx11-6 2:1.4.99.1-0ubuntu2
  ProcVersionSignature: Ubuntu 3.2.0-23.36-generic-pae 3.2.14
  Uname: Linux 3.2.0-23-generic-pae i686
  ApportVersion: 2.0.1-0ubuntu4
  Architecture: i386
  Date: Wed Apr 18 16:18:16 2012
  ProcEnviron:
   LANGUAGE=
   TERM=xterm
   PATH=(custom, no user)
   SHELL=/bin/bash
  SourcePackage: libx11
  UpgradeStatus: No upgrade log present (probably fresh install)

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