booting randomly fails on a dual-boot HP ZBook

[Martin Konôpka]

affected computer: HP ZBook 15, dual-booting Windows 7 and Ubuntu (64 bit)

It frequently occurs that the notebook freezes at the beginning of the boot process. There are several randomly occuring issues:

* Sometime only the boot options are shown and no counter (of seconds of time). The machine would not boot at all without pressing Enter. Even if I press the key, the booting process usually stops shortly, showing some text ("unable to ... transceiver", or something like, I do not remember precisely).

* Sometime the text about the transceiver is shown in small letters and with the purple background. In other cases the letters are much larger and with black background.

* If the machine freezes while it is booting there is no help but the long press of the power button.

* This time I was able to succesfully boot only after about 4 unsuccesfull attempts. Previous days it was about 50 % of unsuccesfull attempts.

I have both the official kernel and also the lastest mainline build. The booting issues occur with both of them.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: grub-pc 2.02~beta2-6
ProcVersionSignature: Ubuntu 3.13.0-8.28-generic 3.13.2
Uname: Linux 3.13.0-8-generic x86_64
ApportVersion: 2.13.2-0ubuntu3
Architecture: amd64
CurrentDesktop: Unity
Date: Fri Feb 14 22:37:25 2014
InstallationDate: Installed on 2014-01-31 (14 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140130)
SourcePackage: grub2
UpgradeStatus: No upgrade log present (probably fresh install)

[Phillip Susi (psusi)]

Do you mean it freezes after choosing to boot Ubuntu from the menu? Can you get a picture of the exact error?

[Launchpad Janitor (janitor)]

[Expired for grub2 (Ubuntu) because there has been no activity for 60 days.]