Bug 66697

Summary: mouse over destop icon leaves detritus all over screen
Product: [Retired] Red Hat Raw Hide Reporter: ellson
Component: XFree86Assignee: Mike A. Harris <mharris>
Status: CLOSED RAWHIDE QA Contact: Aaron Brown <abrown>
Severity: medium Docs Contact:
Priority: medium    
Version: 1.0   
Target Milestone: ---   
Target Release: ---   
Hardware: i386   
OS: Linux   
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2002-12-19 11:56:44 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Bug Depends On:    
Bug Blocks: 67218, 79579    
Description Flags
fixed version of /etc/XF86Config-4
/var/log/XFree86.0.log none

Description ellson 2002-06-13 18:57:39 UTC
Description of Problem:
Moving the mouse over the "ellson's home" desktop icon, without clicking,
results in "ellson's home" being written all over various windows
on the screen.  It looks like perhaps an attempt to refresh or highlight
the icon text is being written to the wrong screen coordinates.

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

How Reproducible:
every time

Steps to Reproduce:
1.move mouse over nautilus icons 

Actual Results:
string detritus

Expected Results:
no detritus

Additional Information:
I don't know that this is significant, but I'm using a dual headed display

Comment 1 Havoc Pennington 2002-06-13 19:56:24 UTC
This sounds very much like an X server bug. You may want to provide information
about your video hardware.

Comment 2 ellson 2002-06-14 14:07:32 UTC
Display hardware is Matrox G450

Processor is dual SMP:  i686 Pentium II (Deschutes) @ 450 MHz

X is XFree86-4.2.0-50.16

Problem seems to be triggered by something in Nautilus only.  Problem
occurs both with icons on desktop and with icons in nautilus window.

Comment 3 ellson 2002-07-08 13:57:11 UTC
Tentatively, I'm no longer seeing this problem on
Any idea what fixed it?

Comment 4 ellson 2002-07-08 15:28:55 UTC
Bad news, its not completely fixed, although it does seem to be much better.

I'll play with it some more to see if I can find a way to reliably reproduce the

Comment 5 ellson 2002-07-09 22:48:39 UTC
I can create the detritus quite reliably by opening xosview on screen0 of 
the dual head display, then grabbing a gnome-terminal window and moving it 
around the screen, and in particular movie it so that it obscures
and reexposes the nautilus desktop icons.

There is continuous activity on xosview, so my guess is thats its related to 
upadates in multiple windows at the same time.

The detritus is usually the icon labels rendered in black at random positions
over the screen, but I've also seen other text droppings, not all of them from

This is all with today's rawhide updates:

Comment 6 Mike A. Harris 2002-07-26 07:31:50 UTC
This almost certainly is either a bug in the Matrox driver's 2D acceleration
code, or the hardware mouse pointer code.

Can you try using Option "swcursor" in your X config, and report back if
the problem goes away.  If not, try Option "noaccel" instead.  Then try
both of them at once.  Report back what if anything makes the problem
go away, and we can then work on pinpointing where the corruption occurs.

Comment 7 ellson 2002-07-26 15:29:59 UTC
Option "swcursor"                no fix.
Option "noaccel"                  fixed.
Option "noaccel" and :swcursor"   fixed. 

I played with the Xaa options.....

Option "XaaNoScreenToScreenCopy" by itself, just on Screen-0, fixed the problem.

Should I be taking up this problem with Matrox at this point?

Comment 8 ellson 2002-07-26 15:31:57 UTC
Created attachment 67224 [details]
fixed version of /etc/XF86Config-4

Comment 9 Mike A. Harris 2002-08-06 00:17:59 UTC
Yes, this problem should be brought to the attention of Matrox if
possible.  They maintain the mga driver for the most part now.  The
specs are not available for the G450, however it might still be able
to debug/troubleshoot the problem and fix it.

For now, I've added the above option to the G450 configuration by
default until a proper fix can be found.

The latest hwdata package in rawhide has this change now.  hwdata-0.37-1

Comment 10 Mike A. Harris 2002-11-07 21:26:48 UTC
Reopening bug, to track for real fix rather than workaround above.

Comment 11 ellson 2002-11-18 20:14:57 UTC
This problem has gotten much worse with XFree86- from
rawhide.   Now the transparent cursor is left splatted all over Screen-1.
This is the other screen from the first problem and the new splats are not fixed
by 'Option      "XaaNoScreenToScreenCopy" ""'

Comment 12 Mike A. Harris 2002-11-25 14:44:15 UTC
In order to try and find the best fix, I will need you to test-drive
some different drivers for me.


Please copy this overtop of the existing mga_drv.o that comes with
the rawhide XFree86 you're using now.

Edit the config file, and comment out all XaaNo options, noaccel, etc.

We want to test this driver with no special options enabled.

Please provide me with an updated comment, as well as the output of:
ls -al /usr/X11R6/lib/modules/drivers/mga_drv.o

and a new copy of your X log and config file

Comment 13 ellson 2002-11-26 00:52:55 UTC
Created attachment 86424 [details]

Comment 14 ellson 2002-11-26 00:53:49 UTC
Created attachment 86425 [details]

Comment 15 ellson 2002-11-26 00:55:57 UTC
Looks good so far.   I've not seen any text detritus nor cursor splats
after about 1 hour of usage.

ellson@amber:ellson> ls -al /usr/X11R6/lib/modules/drivers/mga_drv.o
-rw-r--r--    1 root     root       189974 Nov 25 19:32

Comment 16 Mike A. Harris 2002-12-19 11:56:44 UTC
Great, closing as fixed in rawhide with Xrender patch