Bug 471474

Summary: desktop effects on + switch to tty and back = crash of Xorg; gdb attaching -> total freeze of computer
Product: [Fedora] Fedora Reporter: Matěj Cepl <mcepl>
Component: xorg-x11-drv-i810Assignee: Adam Jackson <ajax>
Status: CLOSED INSUFFICIENT_DATA QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: high Docs Contact:
Priority: high    
Version: 10CC: filbar, mcepl, vbordug, xgl-maint
Target Milestone: ---   
Target Release: ---   
Hardware: All   
OS: Linux   
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2009-04-24 05:12:58 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---
Description Flags
/var/log/messages none

Description Matěj Cepl 2008-11-13 21:08:18 UTC
Created attachment 323500 [details]

Description of problem:
Summary basically provides whole story. Switched on desktop-effects and when triaging bug 471353 I tried to prove that switching between console and X just works, I got black screen on returning to X :-). Computer was not dead and mouse was moving, but aside from the mouse cursor the screen was totally black.

I was able to connect to the computer via ssh from other computer. When trying to gdb --pid=$(pidof Xorg) gdb was begun to start, printed "attaching to the process XXXXX (no debuginfo) ..." and then it froze completely.

Of course, I have no /etc/X11/xorg.conf

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

How reproducible:
happened once

Steps to Reproduce:
1.desktop-effects on
2.Alt+Ctrl+2, Alt+Ctrl+7, Alt+Ctrl+1
Actual results:
black screen with mouse cursor moving

Expected results:
lovely Xorg display with Firefox where I could continue explaining to the reporter that our Xorg Just Works™

Comment 1 Matěj Cepl 2008-11-13 21:09:37 UTC
Created attachment 323501 [details]

Just to emphasize. Xorg.0.log has this lovely crash:

0: /usr/bin/Xorg(xorg_backtrace+0x3b) [0x812b9ab]
1: /usr/bin/Xorg(mieqEnqueue+0x289) [0x810b0c9]
2: /usr/bin/Xorg(xf86PostMotionEventP+0xc2) [0x80d3fb2]
3: /usr/bin/Xorg(xf86PostMotionEvent+0x68) [0x80d4118]
4: /usr/lib/xorg/modules/input//synaptics_drv.so [0x2fe8fe]
5: /usr/lib/xorg/modules/input//synaptics_drv.so [0x300f79]
6: /usr/bin/Xorg [0x80bcb17]
7: /usr/bin/Xorg [0x80ac67e]
8: [0x110400]
9: [0x110416]
10: /lib/libc.so.6(ioctl+0x19) [0xc3e929]
11: /usr/lib/libdrm.so.2 [0x58806cf]
12: /usr/lib/libdrm.so.2(drmWaitVBlank+0x28) [0x5880e08]
13: /usr/lib/dri/i965_dri.so [0x3b056c]
14: /usr/lib/dri/i965_dri.so(driWaitForVBlank+0xd8) [0x3b078c]
15: /usr/lib/dri/i965_dri.so(intelSwapBuffers+0x262) [0x3b65a0]
16: /usr/lib/dri/i965_dri.so [0x3b0906]
17: /usr/lib/xorg/modules/extensions//libglx.so [0x212454]
18: /usr/lib/xorg/modules/extensions//libglx.so [0x204cfe]
19: /usr/lib/xorg/modules/extensions//libglx.so [0x20863a]
20: /usr/bin/Xorg(Dispatch+0x34f) [0x8085e6f]
21: /usr/bin/Xorg(main+0x47d) [0x806b6ed]
22: /lib/libc.so.6(__libc_start_main+0xe5) [0xb796d5]
23: /usr/bin/Xorg [0x806aad1]

Comment 2 Matěj Cepl 2008-11-13 21:10:48 UTC
Created attachment 323502 [details]

Comment 3 Matěj Cepl 2008-11-13 21:19:25 UTC
I would almost forget

Comment 4 Bug Zapper 2008-11-26 05:20:37 UTC
This bug appears to have been reported against 'rawhide' during the Fedora 10 development cycle.
Changing version to '10'.

More information and reason for this action is here:

Comment 5 Vitaly Bordug 2008-11-28 20:10:34 UTC
*** Bug 473489 has been marked as a duplicate of this bug. ***

Comment 6 Vitaly Bordug 2008-11-28 20:13:54 UTC
I would add, that not only gdb lead to total freeze, chvt (iirc) did similar result. Or killing X, not sure...

Comment 7 Matěj Cepl 2009-04-24 05:12:58 UTC
This has evaporated somewhere.