Note: This is a beta release of Red Hat Bugzilla 5.0. The data contained within is a snapshot of the live data so any changes you make will not be reflected in the production Bugzilla. Also email is disabled so feel free to test any aspect of the site that you want. File any problems you find or give feedback here.
Bug 230294 - System generally unresponsive without ShadowFB
Summary: System generally unresponsive without ShadowFB
Alias: None
Product: Fedora
Classification: Fedora
Component: xorg-x11-server
Version: rawhide
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: X/OpenGL Maintenance List
QA Contact:
Depends On:
TreeView+ depends on / blocked
Reported: 2007-02-28 00:06 UTC by Richard Hughes
Modified: 2018-04-11 13:46 UTC (History)
4 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2007-05-11 20:56:15 UTC

Attachments (Terms of Use)

Description Richard Hughes 2007-02-28 00:06:14 UTC
Description of problem:
gnome-terminal seems to make the xorg process use 100% of the CPU for a
2-3 seconds when scrolling text such as dmesg. Does not happen with
Fixed when using Option ShadowFB in xorg.conf, although this is obviously
non-ideal. Also causes general system slowdown in X applications, but to a
lesser degree.

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

How reproducible:
On this machine, always.

Steps to Reproduce:
1. Install rawhide
2. Open gnome-terminal, type dmesg
3. Watch the CPU usage hit 100% for a couple of seconds on a dual core 1.6GHz
Actual results:
LOTS of CPU usage, 2 or three seconds.

Expected results:
A few ms of 0.X% CPU usage.

Additional info:

hughsie@localhost:~$ opreport -cl --demangle=smart `which Xorg`
warning: /usr/bin/Xorg could not be read.
CPU: Core Solo / Duo, speed 1662.68 MHz (estimated)
Counted CPU_CLK_UNHALTED events (Unhalted clock cycles) with a unit mask of 0x00
(Unhalted core cycles) count 860000
samples  %        image name               symbol name
1582     88.2812                 fbCompositeSolidMask_nx8888x8888Cmmx
  1582     100.000                
fbCompositeSolidMask_nx8888x8888Cmmx [self]
136       7.5893                 fbCompositeSrcAdd_8888x8888mmx
  136      100.000                 fbCompositeSrcAdd_8888x8888mmx [self]
65        3.6272                NVSync
  65       100.000                NVSync [self]
5         0.2790  Xorg                     (no symbols)
  5        100.000  Xorg                     (no symbols) [self]
2         0.1116                 fbPolySegment32
  2        100.000                 fbPolySegment32 [self]
1         0.0558           free
  1        100.000           free [self]
1         0.0558                 fbSolidFillmmx
  1        100.000                 fbSolidFillmmx [self]

Comment 1 Matěj Cepl 2007-03-02 17:49:44 UTC
Thanks for the bug report.  We have reviewed the information you have provided
above, and there is some additional information we require that will be helpful
in our diagnosis of this issue.

Please attach your X server config file (/etc/X11/xorg.conf) and X server log
file (/var/log/Xorg.*.log) to the bug report as individual uncompressed file
attachments using the bugzilla file attachment link below.

Could you please also try to run without any /etc/X11/xorg.conf whatsoever and
let X11 autodetect your display and video card? Attach to this bug
/var/log/Xorg.0.log from this attempt as well, please.

We will review this issue again once you've had a chance to attach this information.

Thanks in advance.

Comment 2 Richard Hughes 2007-05-11 15:29:24 UTC
No longer a problem with the latest rawhide. Do you still want the logs? Thanks.

Comment 3 Adam Jackson 2007-05-11 20:56:15 UTC
Nah, 'salright.

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