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Questions tagged [pae]

PAE (Physical Address Extension) is a feature which allows 32-bit x86 processors to access more than 4GB of memory (RAM). As of Ubuntu 12.04, the PAE kernel is the default for 32-bit installations. PAE is supported by all Intel processors since the Pentium II and by AMD since the Athlon; notable exceptions are some Intel Atoms and some Pentium Ms.

65 questions
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How can I install on a non-PAE CPU? (error "Kernel requires features not present on the CPU: PAE")

After burning Ubuntu 12.04 to a CD, I tried booting and got the message: This kernel requires the following features not present on the CPU: pae Unable to boot - please use a kernel appropriate for your CPU. What does this mean?
oshirowanen
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Virtualbox install 12.04 guest: "pae not present"

I get this message while trying to install Ubuntu 12.04 as a guest in VirutalBox 4.1.18, on an Ubuntu 10.04 host. This kernel requires the following feature not present on the CPU: pae Some host specs: The host's kernel is: Linux…
Peter.O
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What's the meaning of "-pae" at the end of kernel version?

Last time I installed Ubuntu there was a "-pae" at the end of the kernel version in the boot screen. Now that I've reinstalled Ubuntu from the same disk instead of "-pae" there is a "-generic" at the end of kernel version. What's the meaning of…
Nick.h
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8 GB RAM on 64 bit processor using 32 bit Ubuntu

I'm going to repeat the title in a longer word. Can a 32 bit Ubuntu address more than 4 gb of RAM on a 64 bit processor?
asdacap
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3 answers

Unable to Install VirtualBox Due to Missing Kernel Module

I am trying to install VirtualBox on my Ubuntu. I first tried to sudo apt-get install virtualbox-ose in a terminal, but after the configuration step, it fails with an error: No suitable module for running kernel found When proceeding with…
SoftTimur
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How can I tell if a machine has PAE?

I want to help someone upgrade an oldish laptop from 11.10 to 12.04, which requires PAE. I am not sure whether they have PAE or not. I know it is likely that they do have it after all, but how can I tell before trying to upgrade?
lofidevops
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How to replace a PAE kernel with non PAE Kernel?

After reading the information from my Question pros/cons of PAE , i want to remove PAE kernel because i don't need them . I know removing a kernel from Synaptic Package Manager . Thats easy job but how to get Non-PAE kernel of current ?
Raja G
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For a 32-bit kernel, what are the pros/cons of PAE vs. non-PAE?

I am using Ubuntu 12.04 32-bit. My kernels are PAE kernels. I know these are the kernels we can use for 32-bit OS which have 4 GB RAM, to utilize all 4GB of RAM. My system is a 32-bit system. So I thought I don't need them. What are the advantages…
Raja G
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Ubuntu 12.04 LTS 32bit does not detect 4Gb ram

I have recently installed 4Gb of ram for an existing 12.04 32bit Ubuntu. It's not being recognised, only 3.2Gb is showing, See: administrator@Root2:~$ free total used free shared buffers cached Mem: 3355256 …
David
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Why is 12.04 using a PAE dependent kernel by default?

Recently when I was trying Ubuntu 12.04 beta I got to know that it was using a PAE kernel, but I am not sure of the reason. Why has Ubuntu shifted to PAE kernel ? Also Is there a non PAE version also available?
coder
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4 answers

Does 32-bit PAE with more than 4GB RAM improve speed?

I would like to buy a Thinkpad T420 with 8GB RAM configuration and install specifically 32-bit Ubuntu Desktop with PAE as I heard that 64-bit version has some issues such as providing support for applications based on Flash. Theoretically more RAM…
samarasa
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Intel Core i3 CPU is not 64 bit?

According to this page: https://help.ubuntu.com/community/32bit_and_64bit the following Intel CPU's are 64bit: Intel F and 5x1 series Pentium 4 using the "Prescott" core Pentium D Core 2 (Solo, Duo & Quad) Core i5 (all) Core i7 (all) Isn't the Core…
oshirowanen
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3 answers

cannot install Ubuntu (message about PAE)

I received the error message below on the black terminal screen after waiting for a reboot.. I tried to find "forcepae" in the available options but couldn't. Can Anyone please help? ERROR: PAE is disabled on this Pentium M (PAE can potentially be…
user273295
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4 answers

Is there any version of Ubuntu that does not require PAE?

For the first time I tried to install Xubuntu 12.04 on my computer using the Grub4dos way. However, it stuck and showed "This kernel requires the following features not present on the CPU : PAE". I therefore checked my device and found that my CPU…
JerryzTschin
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2 answers

How do I install a non-PAE kernel on PAE-enabled hardware for Ubuntu 12.04?

I need to install a non-PAE kernel for a 64-bit machine that supports PAE. 32-bit 12.04 currently comes with a PAE kernel but I need to get a non-PAE kernel. An older version of Ubuntu is also acceptable as long as it runs in 32-bit mode.
recluze
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