Also getting this with a zBook 15 and Ubuntu 14.10
Linux 3.16.0-28-generic #38-Ubuntu SMP Fri Dec 12 17:37:40 UTC 2014 x86_64
x86_64 x86_64 GNU/Linux
$ lspci | grep -i vga
00:02.0 VGA compatible controller: Intel Corporation 4th Gen Core Processor
Integrated Graphics Controller (rev 06)
01:00.0 VGA compatible controller: NVIDIA Corporation GK107GLM [Quadro K1100M]
(rev ff)
$ dpkg --list | grep nvidia
ii nvidia-331 331.113-0ubuntu0.1
amd64 NVIDIA binary driver - version 331.113
ii nvidia-331-uvm 331.113-0ubuntu0.1
amd64 NVIDIA Unified Memory kernel module
ii nvidia-opencl-icd-331 331.113-0ubuntu0.1
amd64 NVIDIA OpenCL ICD
ii nvidia-prime 0.6.7
amd64 Tools to enable NVIDIA's Prime
ii nvidia-settings 331.20-0ubuntu8
amd64 Tool for configuring the NVIDIA graphics driver
Ctrl-alt-F1 , ctrl-alt-f7 workaround unlocks things.
Tried changing /etc/default/grub to have
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash rcutree.rcu_idle_gp_delay=1"
but it did not change the lockup.
In kern.log get
kernel: [ 6891.094246] ACPI Warning: \_SB_.PCI0.PEGP.DGFX._DSM:
Argument #4 type mismatch - Found [Buffer], ACPI requires [Package]
(20140424/nsarguments-95)
If I run "nvidia-settings" and change "PRIME profiles" from
NVIDIA (Performance Mode)
to
Intel (Power Saving Mode)
then it stops the lock up
May be related to https://bugs.debian.org/cgi-
bin/bugreport.cgi?bug=763272 as I noticed that
With PRIME profile as NVIDIA you get (the below number is from memory - but the
ON I know was set )
$ cat /proc/acpi/bbswitch
0000:01:00.0 ON
and it can't be changed as per bug
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=763272
Also with PRIME profile as Intel you get
$ cat /proc/acpi/bbswitch
0000:01:00.0 OFF
** Bug watch added: Debian Bug tracker #763272
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=763272
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https://bugs.launchpad.net/bugs/1310762
Title:
[HP ZBook 15 Mobile Workstation] Ubuntu 14.04 random freeze and lock
up
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