In spite of their age many of the affected computers (IBM Thinkpads and Dell Latitudes, for example) are suitable for today's use if given a light distro like Xubuntu or Lubuntu among other advantages they have a low power consumption. The same distinction (Banias versus Dothan) goes for the lower performing Celeron M processors. Pentium M's of the Dothan family display the PAE flag correctly and support the latest Buntus without modifications. The problem is not missing PAE, it's about the processor not displaying its full capabilities. However, these processors are in fact able to run the latest (and PAE-demanding) kernels if only the installation process is modified a little. Lubuntu and Xubuntu offered a PAE and a non-PAE release up to and including 12.04, but from 12.10 only the PAE releases are maintained.Ī number of older Pentium M processors produced around 2003-4 (the Banias family) do not display the PAE flag, and hence a normal installation fails. Because PAE is close to being a standard it is now a requirement for Ubuntu: During installation the processor is prompted for the PAE flag, and only if present the process will carry on. Physical Address Extension (PAE) is a feature found on almost all 32 bit processors produced after Pentium Pro, ie. If you are going to upgrade (as opposed to install) there is advice here. Technical note: After booting, "dmesg | grep -i pae" will now show "PAE forced!". This link describes use of the "-" in boot options. This is a change from older installs where only one parameter was sufficient. The "forcepae" option must be entered twice, before and after the delimiter " - ", so that it is applied to both the kernel on the ISO and the kernel on the system after installation. If everything appears to work you don't have to read further. A possible warning about forcepae being experimental does not matter for Pentium M or Celeron M processors. Press return, and after a moment the installation begins. Add 'forcepae' to the string before and after the two or three dashes ("forcepae - forcepae"). Now a string of options is visible, often with 'quiet' or 'quiet splash -' at the end. The option 'forcepae' is not there, so press Escape to close the list. With the cursor on the top choice press F6 (If you use the minimal ISO then press Tab in stead of F6).Ī menu with a number of options appear.
When the image of a keyboard and a little man in a circle appears, hit the tab key. If you encounter an error related to PAE while installing Lubuntu 18.04 LTS, the solution is as follows:īoot the computer with a 32-bit Lubuntu DVD in the DVD drive. A guide for getting computers with older Pentium M and Celeron M processors to work with the latest Lubuntu
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