You have been subscribed to a public bug:

My White iMac 24" is unable to start an X-Windows session with the
Ubuntu Install DVD.

I am running Ubuntu 14.04.5 LTS (Trusty Tahir)

It looks like the kernel/initrd is loading the nouveau_304 driver, but
this results in a garbled screen (see attachment).  For even more
information, please see:

http://mymanthemaker.blogspot.hk/2017/03/getting-white-24-core-2-duo-imac-to.html
http://mymanthemaker.blogspot.hk/2017/03/imac-ubuntu-install-gone-wrong-install.html

For exhaustive detail and many screen shots.

The error messages I see in dmesg (thousands of them) are:

nouveau 0000:01:00.0: fifo: DMA_PUSHER - ch 1 [Xorg[2121]] get 00018000
put 000180a0 state 80000000 (err: INVALID_CMD) push 00000000

and

nouveau 0000:01:00.0: Xorg[2121]: failed to idle channel 1 [Xorg[2121]]

and

EQ overflowing. Additional events will be discarded until existing
events are processed.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-4.4.0-31-generic 4.4.0-31.50~14.04.1
ProcVersionSignature: Ubuntu 4.4.0-31.50~14.04.1-generic 4.4.13
Uname: Linux 4.4.0-31-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.21
Architecture: amd64
Date: Sat Mar 25 06:39:17 2017
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: linux-lts-xenial
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: linux-lts-trusty (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug trusty
-- 
Default nouveau video driver creates garbled display (White 24" iMac w/ NVIDIA 
GeForce 7600 GT)
https://bugs.launchpad.net/bugs/1675996
You received this bug notification because you are a member of Kernel Packages, 
which is subscribed to linux-lts-trusty in Ubuntu.

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to     : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp

Reply via email to