Bug 592815 - "Memory Remap Feature" in BIOS results in system slowness
Summary: "Memory Remap Feature" in BIOS results in system slowness
Alias: None
Product: Fedora
Classification: Fedora
Component: kernel
Version: 13
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Kernel Maintainer List
QA Contact: Fedora Extras Quality Assurance
Depends On:
TreeView+ depends on / blocked
Reported: 2010-05-17 04:54 UTC by bloodandsoil76
Modified: 2013-01-10 05:58 UTC (History)
7 users (show)

Clone Of:
Last Closed: 2011-06-27 16:24:51 UTC

Attachments (Terms of Use)

Description bloodandsoil76 2010-05-17 04:54:45 UTC
Description of problem:

When the "Memory Remap Feature" is set to "Enabled" in the BIOS, the system is very slow:  Screen redraws slowly (you can visibly see the redraw crawling down the screen), when typing on the keyboard the text lags behind by over 5 seconds, when clicking on any menus the response comes 5 seconds later, etc.  This slowness problem occurs on about 1 out of every 2 times that the system is booted.

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

I observed this problem running Fedora 12 x86_64 and in Fedora 13 i686 (Release Candidate 3).

How reproducible:

Randomly reproducible:  The problem occurs on approximately 1 out of every 2 system starts.  When the problem occurs, it remains in effect until the system is restarted.

Steps to Reproduce:
1.  Set "Enable Memory Remap Feature" to "Enabled" in the BIOS.
2.  Start Fedora (either cold boot or warm boot).
3.  If problem does not occur, restart the system.  There is a random reproducibility with about a 50% chance of the problem showing itself.
Actual results:

When the problem occurs, the system is very slow.

Expected results:

I would expect that the "Memory Remap Feature" would not ever cause system slowness.  This feature is necessary for the system to read the full 4GB of physical memory.  Without this feature enabled, the system sees only 3032160 kB of physical memory.

Additional info:

ASUS P5B-Deluxe motherboard
Intel Core 2 Duo E6600 Conroe 2.4GHz
ATI Radeon HD 4850 512MB
Crucial Ballistix 4 x 1GB PC2 6400 4-4-4-12, 2.2V

Comment 1 Bug Zapper 2011-06-02 13:56:55 UTC
This message is a reminder that Fedora 13 is nearing its end of life.
Approximately 30 (thirty) days from now Fedora will stop maintaining
and issuing updates for Fedora 13.  It is Fedora's policy to close all
bug reports from releases that are no longer maintained.  At that time
this bug will be closed as WONTFIX if it remains open with a Fedora 
'version' of '13'.

Package Maintainer: If you wish for this bug to remain open because you
plan to fix it in a currently maintained version, simply change the 'version' 
to a later Fedora version prior to Fedora 13's end of life.

Bug Reporter: Thank you for reporting this issue and we are sorry that 
we may not be able to fix it before Fedora 13 is end of life.  If you 
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The process we are following is described here: 

Comment 2 Bug Zapper 2011-06-27 16:24:51 UTC
Fedora 13 changed to end-of-life (EOL) status on 2011-06-25. Fedora 13 is 
no longer maintained, which means that it will not receive any further 
security or bug fix updates. As a result we are closing this bug.

If you can reproduce this bug against a currently maintained version of 
Fedora please feel free to reopen this bug against that version.

Thank you for reporting this bug and we are sorry it could not be fixed.

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