2nd February 2017, 10:06
Obviously i'm "interested" [wild understatement] in why my 1/1/17-clean-reinstalled Nouveau-drivered Maui 2.1 P5.8.4 has suffered these multiple freezes needing hard resets.
However, i'm also interested in understanding why REISUB has not worked any of these 2017 times, despite working in my original 2016 installation of Maui [not clean, was on top of Mint 17.3 KDE4], & also working back when i did use said Mint.
I wondered if maybe the Ubuntu 16.04, or Maui, Devs had chosen to disable it, but it seems partly not, if i'm understanding "176" correctly as enabling "S U B" in /etc/sysctl.d/10-magic-sysrq.conf...
SUB [= 16 + 32 + 128] is only half of REISUB. What are the Maui Devs' opinions about me editing this file to make the value "1" (ie, uncomment the "1" line], or otherwise deducing what the new number should be to add the REI to the existing SUB [maybe 244, according to my deduction from https://askubuntu.com/questions/11002/al...ptop#11194]?
However, i'm also interested in understanding why REISUB has not worked any of these 2017 times, despite working in my original 2016 installation of Maui [not clean, was on top of Mint 17.3 KDE4], & also working back when i did use said Mint.
I wondered if maybe the Ubuntu 16.04, or Maui, Devs had chosen to disable it, but it seems partly not, if i'm understanding "176" correctly as enabling "S U B" in /etc/sysctl.d/10-magic-sysrq.conf...
Code:
# The magic SysRq key enables certain keyboard combinations to be
# interpreted by the kernel to help with debugging. The kernel will respond
# to these keys regardless of the current running applications.
#
# In general, the magic SysRq key is not needed for the average Ubuntu
# system, and having it enabled by default can lead to security issues on
# the console such as being able to dump memory or to kill arbitrary
# processes including the running screen lock.
#
# Here is the list of possible values:
# 0 - disable sysrq completely
# 1 - enable all functions of sysrq
# >1 - enable certain functions by adding up the following values:
# 2 - enable control of console logging level
# 4 - enable control of keyboard (SAK, unraw)
# 8 - enable debugging dumps of processes etc.
# 16 - enable sync command
# 32 - enable remount read-only
# 64 - enable signalling of processes (term, kill, oom-kill)
# 128 - allow reboot/poweroff
# 256 - allow nicing of all RT tasks
#
# For example, to enable both control of console logging level and
# debugging dumps of processes: kernel.sysrq = 10
#
kernel.sysrq = 176SUB [= 16 + 32 + 128] is only half of REISUB. What are the Maui Devs' opinions about me editing this file to make the value "1" (ie, uncomment the "1" line], or otherwise deducing what the new number should be to add the REI to the existing SUB [maybe 244, according to my deduction from https://askubuntu.com/questions/11002/al...ptop#11194]?