Bugzilla will be upgraded to version 5.0 on December 2, 2018. The outage period for the upgrade will start at 0:00 UTC and have a duration of 12 hours
Bug 224311 - Xephyr segfaults on startup
Xephyr segfaults on startup
Product: Fedora
Classification: Fedora
Component: xorg-x11-server (Show other bugs)
x86_64 Linux
medium Severity medium
: ---
: ---
Assigned To: X/OpenGL Maintenance List
Depends On:
  Show dependency treegraph
Reported: 2007-01-25 02:16 EST by Jonathan Eskritt
Modified: 2007-11-30 17:11 EST (History)
0 users

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2007-01-29 18:02:07 EST
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)

  None (edit)
Description Jonathan Eskritt 2007-01-25 02:16:03 EST
Description of problem:
I try to start a Xephyr window using:
Xephyr :2 -host-cursor -screen 800x480x16 -dpi 96 -ac
as described in the  maemo 3.0 tutorial

but it segfaulst with the error:
Extended Input Devices not yet supported. Impelement it at line 625 in kinput.c
Segmentation fault

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. Xephyr :2 -host-cursor -screen 800x480x16 -dpi 96 -ac

Actual results:
A window frame beirfly appears before a segfault occurs

Expected results:
a xephyr window should appear

Additional info:
Comment 1 Adam Jackson 2007-01-29 18:02:07 EST
This appears to be a 64-bitness bug in Xephyr.  hostx.c is being built all
wrong; KeySym is defined as XID is defined as unsigned long, which would be fine
on 32 bit but not here.  As a result, the keymap fill code walks off into other
bits of .data, and smashes the cursor private index, so the next call to
pScreen->RealizeCursor() explodes.  Pretty cool!

hostx.c is special and needs to thunk between X server and Xlib types, which are
not the same sizes even though they're the same type names.  So basically you
can't ever talk about KeySyms, you just have to know that they're unsigned
32-bit ints.  So gross.  But, fixed in 1.2.0-3 and in 1.1.1-47.5.fc6, the latter
of which will be in updates shortly.


Note You need to log in before you can comment on or make changes to this bug.