Ubuntu
linux package

Generic Kernel does not recognise 4G memory, only 3G

Bug #294109 reported by Ramon Casha
12
This bug affects 1 person
Affects Status Importance Assigned to Milestone
linux (Ubuntu)
Won't Fix
Undecided
Andy Whitcroft

Bug Description

I have a laptop HP Compaq 6710b with 4Gb of RAM. However, in the default (generic kernel) installation, only 3Gb of RAM is recognised. Installing the server kernel shows the full 4Gb (meminfo shows 4133708 kB).

This is intrepid with kernel 2.6.27-7

Revision history for this message
Florian M. (flomar) wrote :

I can confirm this on my desktop maschine - Intrepid 8.10 32-bit with all updates. Assuming it is a limitation with the 32bit version of ubuntu i tried the 64bit and had the same issue.
meminfo shows 3111964kB while the bios shows full 4096MB.

Revision history for this message
Andy Whitcroft (apw) wrote :

This is not a bug in the linux-meta package, moving to the linux package.

affects: linux-meta (Ubuntu) → linux (Ubuntu)
Revision history for this message
Andy Whitcroft (apw) wrote :

This is a limitation of a non-PAE kernel as the physical ram is spread over more than 4GB of physical address space. The server or all 64 bit kernels should show you all of your ram. We will be having a PAE 32 bit kernel in the karmic release. This is discussed on the blueprint below:

    https://blueprints.edge.launchpad.net/ubuntu/+spec/kernel-karmic-flavours

We do not plan to offer a 32 bit PAE kernel for previous releases.

Changed in linux (Ubuntu):
assignee: nobody → Andy Whitcroft (apw)
status: New → Won't Fix
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