Nouveau - Mar 2017 - Fwd: Nouveau Drivers for iMac 24" (GeForce 7600 GT)

Bonjour Everyone!

I am trying to get the video working on an iMac 24" Core 2 Duo with an
integrated GeForce 7600 GT.
The installation disk I am using  (Ubuntu Trusty Tahir 14.04.5 LTS modified
for the mac) loads nouveau and tries to use the 304 drivers, but fails.

The story of the problem is documented here, but not the solution (yet)

http://mymanthemaker.blogspot.hk/2017/03/imac-ubuntu-
install-gone-wrong-install.html

When I boot the machine, in the end, this is what I see:

[image: Inline image 1]

I have tried a LOT of different approaches, including trying to disable the
nouveau kernel module and installing the following proprietary NVIDIA
driver:

NVIDIA-Linux-x86_64-304.135.run

But I have had no luck at all.
Before anyone asks me if the video card is messed up, I have seen proper
"graphics" displayed on this machine before, sometimes during boot:

[image: Inline image 2]

And I ONCE in a user session got a proper video screen with "xinit"
that
provided me with an old-school xterm and the classic "cross" mouse
cursor.
But when I moved the mouse, or when I stared "xeyes", the machine
froze.

How can I get some help with troubleshooting this problem?

The dmesg errors I am seeing are:

[  642.016069] nouveau 0000:01:00.0: DRM: Calling LVDS script 6:
[  642.016075] nouveau 0000:01:00.0: DRM: 0xC165: Parsing digital output
script table
(this is a unique entry)

[    8.978307] nouveau 0000:01:00.0: fifo: CACHE_ERROR - ch 0 [DRM] subc 3
mthd 0d94 data ffffffff
[    8.978323] nouveau 0000:01:00.0: fifo: CACHE_ERROR - ch 0 [DRM] subc 3
mthd 0d98 data ffffffff
[    8.981130] nouveau 0000:01:00.0: fifo: CACHE_ERROR - ch 0 [DRM] subc 3
mthd 0d9c data ffffffff
[    8.983911] nouveau 0000:01:00.0: fifo: CACHE_ERROR - ch 0 [DRM] subc 3
mthd 0da0 data ffffffff
(thousands of the above are in my dmesg log)

Also, I don't know if the GeForce 7600 GT uses "low memory" but I
am
getting the following error:

[   66.016047] Corrupted low memory at ffff8800000019c0 (19c0 phys) 4f000000
[   66.016932] ------------[ cut here ]------------
[   66.016941] WARNING: CPU: 0 PID: 110 at /build/linux-lts-xenial-
gUF4JR/linux-lts-xenial-4.4.0/arch/x86/kernel/check.c:141
check_for_bios_corruption+0x103/0x110()
[   66.016942] Memory corruption detected in low memory

When I execute "startx", this is what I currently see in the terminal
window:

root at sentinel:~/NVIDIA# startx
hostname: Name or service not known
xauth: (stdin):1:  bad display name "sentinel:0" in "add"
command


X.Org X Server 1.18.3
Release Date: 2016-04-04
X Protocol Version 11, Revision 0
Build Operating System: Linux 3.13.0-92-generic x86_64 Ubuntu
Current Operating System: Linux sentinel 4.4.0-31-generic
#50~14.04.1-Ubuntu SMP Wed Jul 13 01:07:32 UTC 2016 x86_64
Kernel command line: BOOT_IMAGE=/boot/vmlinuz-4.4.0-31-generic
root=UUID=7cf8c703-124e-4030-8a7a-7146c5ff622d ro text quiet splash text
Build Date: 03 August 2016  12:15:46PM
xorg-server 2:1.18.3-1ubuntu2.2~trusty2 (For technical support please see
http://www.ubuntu.com/support)
Current version of pixman: 0.30.2
        Before reporting problems, check http://wiki.x.org
        to make sure that you have the latest version.
Markers: (--) probed, (**) from config file, (==) default setting,
        (++) from command line, (!!) notice, (II) informational,
        (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(==) Log file: "/var/log/Xorg.0.log", Time: Sat Mar 25 05:35:58 2017
(==) Using config file: "/etc/X11/xorg.conf"
(==) Using system config directory "/usr/share/X11/xorg.conf.d"
modprobe: FATAL: Module nvidia not found.
modprobe: FATAL: Module nvidia not found.
resize called 1920 1200
xinit: connection to X server lost

waiting for X server to shut down ..........
xinit: X server slow to shut down, sending KILL signal

waiting for server to die ...
xinit: X server refuses to die
xauth: (argv):1:  bad display name "sentinel:0" in "remove"
command

And this is what I see

[image: Inline image 1]


I hope someone can give me some help/advice with this problem.

I am no expert with nouveau...I think I need some help from an expert..  :)

Best Regards,

Graham Leach

www.graham-leach.com | +852 6977 9076 <6977%209076> | SKYPE: graham_leach
|
  @graham_leach | hk.linkedin.com/in/grahamrleach | about.me/GrahamLeach
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