nouveau going off the deep end...

Felix Miata mrmazda at
Mon Jun 20 04:10:24 UTC 2022

Robert Heller composed on 2022-06-19 16:31 (UTC-0400):

> I am running Ubuntu 18.04 on an AMD Phenom(tm) II X4 945 Processor, 8Gig of 
> RAM, with a NVIDIA Corporation C77 [GeForce 8200] (rev a2) video chipset.  
> There is some sort of bug in the version of KiCaD I have 
> (4.0.7+dfsg1-1ubuntu2) with its pcbnew program that puts my machine in a state 
> where I have to use the "magic" SysRq key to forceably reboot it (I can ssh in 
> from another computer, but /sbin/reboot does not work).

> I've included the last of the kernel log.  It looks like something is broken 
> in nouveau, which I am guessing has something to do with the video somehow.  
> (And no, I am not going to download and install NVIDIA's video driver.)

> I don't know if this is a kernel problem (I current have kernel 
> 4.15.0-187-generic), or something in X Server.

You're using the nouveau kernel driver, but are you using the nouveau DDX display
driver, or the modesetting DIX display driver? Does switching to the other make
any difference?

I have a little bit newer NV84, also with Tesla architecture used by GeForce 8200,
working normally on 18.04, using modesetting DIX:

# inxi -GSaz --vs
inxi 3.3.19 (2022-06-17)
  Kernel: 4.15.0-187-generic arch: x86_64 bits: 64 compiler: gcc v: 7.5.0
    parameters: ro root=LABEL=<filter> net.ifnames=0 ipv6.disable=1
    noresume mitigations=auto consoleblank=0 plymouth.enable=0
  Desktop: Trinity v: R14.0.13 tk: Qt v: 3.5.0 info: kicker wm: Twin v: 3.0
    vt: 7 dm: TDM Distro: Ubuntu 18.04.6 LTS (Bionic Beaver)
  Device-1: NVIDIA G84 [GeForce 8600 GT] vendor: XFX Pine driver: nouveau
    v: kernel alternate: nvidiafb non-free: 340.xx
    status: legacy (EOL, try --gpu) arch: Tesla process: 40-80nm
    built: 2006-13 pcie: gen: 1 speed: 2.5 GT/s lanes: 16 ports:
    active: DVI-I-1,DVI-I-2 empty: none bus-ID: 01:00.0 chip-ID: 10de:0402
    class-ID: 0300
  Display: x11 server: X.Org v: 1.19.6 driver: X: loaded: modesetting
    alternate: fbdev,nouveau,vesa gpu: nouveau display-ID: :0 screens: 1
  Screen-1: 0 s-res: 3840x1200 s-dpi: 120 s-size: 812x254mm (31.97x10.00")
    s-diag: 851mm (33.5")
  Monitor-1: DVI-I-1 pos: primary,left model: NEC EA243WM serial: <filter>
    built: 2011 res: 1920x1200 hz: 60 dpi: 94 gamma: 1.2
    size: 519x324mm (20.43x12.76") diag: 612mm (24.1") ratio: 16:10 modes:
    max: 1920x1200 min: 640x480
  Monitor-2: DVI-I-2 pos: right model: Samsung built: 2009 res: 1920x1080
    hz: 60 dpi: 305 gamma: 1.2 size: 160x90mm (6.3x3.54") diag: 184mm (7.2")
    ratio: 16:9 modes: max: 1920x1080 min: 720x400
  OpenGL: renderer: NV84 v: 3.3 Mesa 20.0.8 direct render: Yes
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Felix Miata

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