Red Hat Bugzilla – Bug 592815
"Memory Remap Feature" in BIOS results in system slowness
Last modified: 2013-01-10 00:58:02 EST
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).
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.
When the problem occurs, the system is very slow.
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.
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
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