Versões de kernel diferentes para versões de 32 e 64 bits do mesmo sistema operacional?

Question

Eu tenho um laptop com instalação lado a lado do Ubuntu 14.04 de 32 bits e 64 bits. Acabei de perceber que tenho diferentes versões do kernel nesses SO (veja os logs abaixo):

• O 32 bit tem kernel: 3.19.0-58
• O 64 bit tem kernel: 4.2.0-35

Minha pergunta é - Isso é esperado / normal? Posso ver nos logs abaixo que a versão de 32 bits reivindica o kernel de linux-generic-lts-vivid e a versão de 64 bits de linux-generic-lts-wily (nenhuma das quais é -trusty e, na verdade, é posterior a ela), mas ambas vem de trusty-security ?!).

Eu realmente não consigo lembrar se eu instalei algo que causou esse estado. Qual seria a maneira recomendada de obter os dois para a mesma versão do kernel?

Logs de 32 bits:

+ uname -a
Linux mypc 3.19.0-58-generic #64~14.04.1-Ubuntu SMP Fri Mar 18 19:05:42 UTC 2016 i686 i686 i686 GNU/Linux
+ cat /etc/issue
Ubuntu 14.04.4 LTS \n \l

+ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 14.04.4 LTS
Release:    14.04
Codename:   trusty
+ apt-show-versions -r linux
intel-linux-graphics-installer:i386 1.1.0-0intel1 installed: No available version in archive
libselinux1:i386/trusty-updates 2.2.2-1ubuntu0.1 uptodate
linux-firmware:all/trusty-security 1.127.20 uptodate
linux-generic-lts-vivid:i386/trusty-security 3.19.0.58.41 uptodate
linux-headers-3.19.0-58:all/trusty-security 3.19.0-58.64~14.04.1 uptodate
linux-headers-3.19.0-58-generic:i386/trusty-security 3.19.0-58.64~14.04.1 uptodate
linux-headers-generic-lts-vivid:i386/trusty-security 3.19.0.58.41 uptodate
linux-image-3.19.0-58-generic:i386/trusty-security 3.19.0-58.64~14.04.1 uptodate
linux-image-extra-3.19.0-58-generic:i386/trusty-security 3.19.0-58.64~14.04.1 uptodate
linux-image-generic-lts-vivid:i386/trusty-security 3.19.0.58.41 uptodate
linux-libc-dev:i386/trusty-security 3.13.0-85.129 uptodate
linux-sound-base:all/trusty 1.0.25+dfsg-0ubuntu4 uptodate
pptp-linux:i386/trusty 1.7.2-7 uptodate
syslinux:i386/trusty 3:4.05+dfsg-6+deb8u1 uptodate
syslinux-common:all/trusty 3:4.05+dfsg-6+deb8u1 uptodate
syslinux-legacy:i386/trusty 2:3.63+dfsg-2ubuntu5 uptodate
util-linux:i386/trusty-updates 2.20.1-5.1ubuntu20.7 uptodate

Logs de 64 bits:

+ uname -a
Linux mypc 4.2.0-35-generic #40~14.04.1-Ubuntu SMP Fri Mar 18 16:37:35 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
+ cat /etc/issue
Ubuntu 14.04.4 LTS \n \l

+ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 14.04.4 LTS
Release:    14.04
Codename:   trusty
+ apt-show-versions -r linux
libselinux1:amd64/trusty-updates 2.2.2-1ubuntu0.1 uptodate
libselinux1:i386/trusty-updates 2.2.2-1ubuntu0.1 uptodate
linux-firmware:all/trusty-security 1.127.20 uptodate
linux-generic-lts-wily:amd64/trusty-security 4.2.0.35.28 uptodate
linux-headers-4.2.0-35:all/trusty-security 4.2.0-35.40~14.04.1 uptodate
linux-headers-4.2.0-35-generic:amd64/trusty-security 4.2.0-35.40~14.04.1 uptodate
linux-headers-generic-lts-wily:amd64/trusty-security 4.2.0.35.28 uptodate
linux-image-4.2.0-35-generic:amd64/trusty-security 4.2.0-35.40~14.04.1 uptodate
linux-image-extra-4.2.0-35-generic:amd64/trusty-security 4.2.0-35.40~14.04.1 uptodate
linux-image-generic-lts-wily:amd64/trusty-security 4.2.0.35.28 uptodate
linux-libc-dev:amd64/trusty-security 3.13.0-85.129 uptodate
linux-signed-generic-lts-wily:amd64/trusty-security 4.2.0.35.28 uptodate
linux-signed-image-4.2.0-35-generic:amd64/trusty-security 4.2.0-35.40~14.04.1 uptodate
linux-signed-image-generic-lts-wily:amd64/trusty-security 4.2.0.35.28 uptodate
linux-sound-base:all/trusty 1.0.25+dfsg-0ubuntu4 uptodate
pptp-linux:amd64/trusty 1.7.2-7 uptodate
syslinux:amd64/trusty 3:4.05+dfsg-6+deb8u1 uptodate
syslinux-common:all/trusty 3:4.05+dfsg-6+deb8u1 uptodate
syslinux-legacy:amd64/trusty 2:3.63+dfsg-2ubuntu5 uptodate
util-linux:amd64/trusty-updates 2.20.1-5.1ubuntu20.7 uptodate

    

Answer 1

Você pode instalar o kernel 4.2 em qualquer versão 14.04.x executando

sudo apt-get install linux-generic-lts-wily

Não está relacionado às versões 32 ou 64 bits.