Red Hat Bugzilla – Bug 474327
X hangs if I set a virtual size with a dimension greater than 2048
Last modified: 2018-04-11 14:09:32 EDT
Created attachment 325513 [details]
Xorg.log with no xorg.conf
Description of problem:
If I use the xorg.conf file to set a virtual size with either dimension greater than 2048, then X never fully starts. It freezes and is basically unresponsive, and if I leave it long enough, I get messages in the log about "EQ overflowing. The server is probably stuck in an infinite loop."
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Create an xorg.conf with a virtual size greater than 2048 in either dimension
2. Restart X
X hangs and eventually prints messages about an infinite loop
X works and I can set up my computer with two side-by-side monitors (without acceleration, but I can live with that)
This is on an Acer Aspire One mini-laptop (http://www.smolts.org/client/show/pub_406b15bb-6d53-4b8b-af01-f18a03b28499)
I'll attach a set of X logs under various conditions.
Created attachment 325514 [details]
Xorg.log with virtual size 2048x2048
Created attachment 325515 [details]
Xorg.log with virtual size 2049x2048
Created attachment 325516 [details]
Xorg.log with larger virtual size, showing backtrace and overflow messages
Created attachment 325517 [details]
xorg.conf used for the above logs
Possibly relevant patch (based on the "Front buffer stride" error message in the logs, and the comments on this mailing-list thread):
New finding: adding Option "NoAccel" "true" to the Device section of the xorg.conf makes larger virtual screens work again. Somewhat slowly, mind you, but it's there.
*** Bug 475090 has been marked as a duplicate of this bug. ***
Problem confirmed using the intel driver and attempting to use the Virtual
display option in xorg.conf (Dell D620 display controller Intel
945GM/GMS/GME) Virtual 2960 1050, error log;
[mi] mieqEnequeue: out-of-order valuator event; dropping.
[mi] EQ overflowing. The server is probably stuck in an infinite loop.
Since this bugzilla report was filed, there have been several major updates in various components of the Xorg system, including Intel driver, which may have resolved this issue.
To be more precise, Intel has undergone a major rewrite during Fedora 10, 11 and 12 cycles, and whole driver is working a lot better now. Users who have experienced this problem are encouraged to retry with at least Fedora 12 Beta and see if the issue is still relevant.
Please, if you experience this problem on Fedora 12 Beta or up-to-date system running Rawhide, let us now in the comment for this bug, or whether the upgraded system works for you.
If you won't be able to reply in one month, I will have to close this bug as INSUFFICIENT_DATA. Thank you.
We hope to see how many older bugs in Intel driver are still relevant today, in hope that most of them were fixed in rewrite process.
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We are sorry, but the Fedora Project is will soon stop longer releasing bug fixes or any other updates for this version of Fedora. There were so many changes between Fedora 10 and Fedora 12 in Intel driver and X.Org that it's very likely that this bug is fixed. This bug will be set to CLOSED:WONTFIX to reflect this, but please reopen it if the problem persists after upgrading to the latest version of Fedora (version 12), which is available from: