Linux kernel 3.12.2 has been released few days before and all users are recommended to upgrade to the latest kernel. This release has many bug fixes and improvements that includes PowerPC, ia64, ARM, s390 and x86 fixes, numerous updated drivers, including USB, SCSI, Wireless, Bluetooth, ACPI and Nouveau, some filesystem improvements (NFS, Btrfs and XFS), sound improvements, as well as other bugfixes.
Bug Fixes
– ACPI / video: Quirk initial backlight level 0
– prepend_path() needs to reinitialize dentry/vfsmount/mnt on restarts
– powerpc/52xx: fix build breakage for MPC5200 LPBFIFO module
– powerpc: ppc64 address space capped at 32TB, mmap randomisation disabled
– powerpc/pseries: Duplicate dtl entries sometimes sent to userspace
– drm/nvc0-/gr: fix a number of missing explicit array terminators…
– arm/arm64: KVM: Fix hyp mappings of vmalloc regions
– nfsd: split up nfsd_setattr
– nfsd: make sure to balance get/put_write_access
– slub: Handle NULL parameter in kmem_cache_flags
– libertas: potential oops in debugfs
– ALSA: hda – Make sure mute LEDs stay on during runtime suspend (Realtek)
– ALSA: hda – Fix Line Out automute on Realtek multifunction jacks
– ALSA: hda – Add headset quirk for Dell Inspiron 3135
– xfs: be more forgiving of a v4 secondary sb w/ junk in v5 fields
– rt2x00: fix a crash bug in the HT descriptor handling fix
– x86/apic: Disable I/O APIC before shutdown of the local APIC.
– rt2x00: rt2800lib: fix VGC adjustment for RT5592.
– KVM: IOMMU: hva align mapping page size.
Read more details in official announcement.
Install or Upgrade Kernel 3.12.2 On Ubuntu / Linux Mint / Debian / Pear OS
Download the latest kernel for Ubuntu / Linux Mint at this page. Or follow the steps below to download and install this kernel:
Open Terminal and enter the following commands one by one.
For 32 bit system:
$ wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.12.2-trusty/linux-headers-3.12.2-031202-generic_3.12.2-031202.201311291538_i386.deb $ wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.12.2-trusty/linux-headers-3.12.2-031202_3.12.2-031202.201311291538_all.deb $ wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.12.2-trusty/linux-image-3.12.2-031202-generic_3.12.2-031202.201311291538_i386.deb
For 64 bit system:
$ wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.12.2-trusty/linux-headers-3.12.2-031202-generic_3.12.2-031202.201311291538_amd64.deb $ wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.12.2-trusty/linux-headers-3.12.2-031202_3.12.2-031202.201311291538_all.deb $ wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.12.2-trusty/linux-image-3.12.2-031202-generic_3.12.2-031202.201311291538_amd64.deb
Now install all downloaded packages as shown below.
$ sudo dpkg -i linux-headers-3.12.2-*.deb linux-image-3.12.2-*.deb
Reboot your system to login to your new kernel.
Caution: If something goes wrong, please boot into old kernel and remove Linux 3.12.2 kernel as shown below.
$ sudo apt-get purge linux-headers-3.12.2-* linux-image-3.12.2-*
Check the Kernel version using command:
$ uname -r
If you have any errors or doubts, please do comment in the comment section.
