Public bug reported:
We use Ubuntu 12.04 + 14.04 HWE. Sometimes the kernel freezes at
startup. There is no kernelpanic. I can not use Systemrequest-Keys for
restart. The only key that gives Feedback is the Numlock-Key (LED
toggles). When i powercyle the Computer Grub has no countdown for
booting the first Kernel. When I press Enter the Kernel starts normaly.
I cannot find something in Syslog or somewhere else. I deactivated the
bootparameter quiet und added the Parameter "console=tty0
console=ttyS0,115200n8". I connected the Computer via a Nullmodemcable
with another computer and logged the bootprocess with minicom. The Logs
are attached. I can not reproduce this Bug in Kernel linux-
image-3.11.0-13-generic
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: i386 kernel-bug precise
** Attachment added: "first-freeze.log"
https://bugs.launchpad.net/bugs/1352358/+attachment/4169527/+files/first-freeze.log
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https://bugs.launchpad.net/bugs/1352358
Title:
Kernel 3.13 freezes sometimes at startup
Status in “linux” package in Ubuntu:
New
Bug description:
We use Ubuntu 12.04 + 14.04 HWE. Sometimes the kernel freezes at
startup. There is no kernelpanic. I can not use Systemrequest-Keys for
restart. The only key that gives Feedback is the Numlock-Key (LED
toggles). When i powercyle the Computer Grub has no countdown for
booting the first Kernel. When I press Enter the Kernel starts
normaly. I cannot find something in Syslog or somewhere else. I
deactivated the bootparameter quiet und added the Parameter
"console=tty0 console=ttyS0,115200n8". I connected the Computer via a
Nullmodemcable with another computer and logged the bootprocess with
minicom. The Logs are attached. I can not reproduce this Bug in Kernel
linux-image-3.11.0-13-generic
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