Issues with nouveau & lockups, freeze on shutdown - SOLVED (Or at least a work around)

[PropAAS DBA <dba@xxxxxxxxxxx>]

All;

I've purchased a  Lenovo Thinkpad P52S back in July with the following specs:

- 8th Generation Intel® Core™ i7-8650U Processor with vPro® (1.90GHz, up to 4.20GHz with Turbo Boost, 8MB Cache)
- 15.6" 4K UHD (3840 x 2160) IPS anti-glare
- 32 GB DDR4 (16 + 16) 2400MHz
- NVIDIA Quadro P500 2GB GDDR5

Ever since then I've had issues with lockups, cpu 'stuck' at 100%, shutdown hangs, etc

I upgraded to Fedora29 and most of the lockup and cpu stuck issues went away but the shutdown hang issue remained.

Often I would see /var/log/messages entries like this:

kernel: nouveau 0000:02:00.0: DRM: Pointer to TMDS table invalid
kernel: watchdog: BUG: soft lockup - CPU#6 stuck for 22s! [Xorg:2145]
kernel: NMI watchdog: Watchdog detected hard LOCKUP on cpu 2
abrt-server[1960]: Oops looks like a problem in kernel module, new component xorg-x11-drv-nouveau

I've recently deployed a change to my system that seems to have fully resolved the issue, note that I use the laptop for business, writing code, running PostgreSQL, etc, so I need none of the benefits of the NVIDIA 3D features, in fact I prefer to NOT use these in order to save on battery life.

I found a fix that forces the use of the Intel video driver (I have a dual intel/NVIDIA card) and nothing else (or so it seems).

I posted this in hopes that it will help others who may have the same issue

I added a new entry into my /etc/X11/xorg.conf file. I already had one since I wanted to force a screen resolution at boot / login time, otherwise you'll need to create one.

See my xorg.conf file below,

Note the only section needed for the "fix" is the Device Section which Sets the Driver = "intel" for Identifier "Card0"

For me this has fixed all of my issues, and I have increased battery life as well.  The entry itself was generated by logging into single user mode as root and running:

X -configure

Then I simply pulled the Device section out that specified the intel driver and added only that entry into my xorg.conf file

# xorg.conf

Section "Monitor"
        Identifier "eDP1"
        Modeline "1344x756_60.00" 82.00 1344 1408 1544 1744 756 759 764 785 -hsync +vsync
        Option "PreferredMode" "1344x756_60.00"
EndSection

Section "Monitor"
        Identifier "DP1"
        Modeline "1344x756_60.00" 82.00 1344 1408 1544 1744 756 759 764 785 -hsync +vsync
        Option "PreferredMode" "1344x756_60.00"
EndSection

#Section "Screen"
        #Identifier "Default Screen"
        #SubSection "Display"
                #Modes "1368x768_60.00"
                ## Modes "960x720"
        #EndSubSection
#EndSection

Section "Device"
        ### Available Driver options are:-
        ### Values: <i>: integer, <f>: float, <bool>: "True"/"False",
        ### <string>: "String", <freq>: "<f> Hz/kHz/MHz",
        ### <percent>: "<f>%"
        ### [arg]: arg optional
        #Option     "Accel"                     # [<bool>]
        #Option     "AccelMethod"               # <str>
        #Option     "Backlight"                 # <str>
        #Option     "CustomEDID"                # <str>
        #Option     "DRI"                       # <str>
        #Option     "Present"                   # [<bool>]
        #Option     "ColorKey"                  # <i>
        #Option     "VideoKey"                  # <i>
        #Option     "Tiling"                    # [<bool>]
        #Option     "LinearFramebuffer"         # [<bool>]
        #Option     "HWRotation"                # [<bool>]
        #Option     "VSync"                     # [<bool>]
        #Option     "PageFlip"                  # [<bool>]
        #Option     "SwapbuffersWait"           # [<bool>]
        #Option     "TripleBuffer"              # [<bool>]
        #Option     "XvPreferOverlay"           # [<bool>]
        #Option     "HotPlug"                   # [<bool>]
        #Option     "ReprobeOutputs"            # [<bool>]
        #Option     "XvMC"                      # [<bool>]
        #Option     "ZaphodHeads"               # <str>
        #Option     "VirtualHeads"              # <i>
        #Option     "TearFree"                  # [<bool>]
        #Option     "PerCrtcPixmaps"            # [<bool>]
        #Option     "FallbackDebug"             # [<bool>]
        #Option     "DebugFlushBatches"         # [<bool>]
        #Option     "DebugFlushCaches"          # [<bool>]
        #Option     "DebugWait"                 # [<bool>]
        #Option     "BufferCache"               # [<bool>]
        Identifier  "Card0"
        Driver      "intel"
        BusID       "PCI:0:2:0"
EndSection

Section "Screen"
    Identifier    "Default Screen"
    Monitor        "Configured Monitor"
    Device        "Configured Video Device"
    DefaultDepth    24
    SubSection "Display"
        Depth    24
        Modes     "1024x768" "800x600"
    EndSubSection
EndSection

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