Ubuntu
linux package

  1. Bug #1697556
  2. Comment #38

Comment 38 for bug 1697556

Revision history for this message
Hagen Kuehn (hag-k) wrote :

@Kai-Heng

In answer to your question "Can you confirm v4.11 freezes but v4.12-rc1 doesn't?", I can confirm that 4.11.12 freezes. Kernel log shows "NMI watchdog: BUG: soft lockup - CPU#3 stuck for 23s! [kworker/3:1:70]".

Below are the test details along with the corresponding kernel log output.

Kernel version used during this test:
http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.11.12/
linux-headers-4.11.12-041112_4.11.12-041112.201707210350_all.deb
linux-headers-4.11.12-041112-generic_4.11.12-041112.201707210350_amd64.deb
linux-image-4.11.12-041112-generic_4.11.12-041112.201707210350_amd64.deb

Detailed answer:
v4.11.12 -> default kernel settings -> Progress icon rotates endlessly. When toggling to the ttl output I see "NMI watchdog: BUG: soft lockup - CPU#3 stuck for 23s! [kworker/3:1:70]" and many more.
-> See attached file kernel.log.4.11.12.WithDefaultKernelArguments.log

v4.11.12 -> NOMODESET -> Progress icon was displayed and rotated for a while but then the entire computer turned off. -> Not frozen but dead.
-> See attached file kernel.log.4.11.12.nomodeset.log

v4.11.12 -> "blacklist=nouveau modprobe.blacklist=nouveau" -> I could login without problems and the desktop appears to be displayed and working as I would expect.
-> See attached file kernel.log.4.11.12.blacklist.nouveau.log