Public bug reported:
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 :01:00.0: fifo: DMA_PUSHER - ch 1 [Xorg[2121]] get 00018000
put 000180a0 state 8000 (err: INVALID_CMD) push
and
nouveau :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=
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
** Attachment added: "Resulting screen using nouveau drivers loaded by INSTALL
DVD"
https://bugs.launchpad.net/bugs/1675996/+attachment/4845286/+files/iMac-Core2Duo-Ubuntu-Power-On-Screen-4.png
** Package changed: linux-lts-xenial (Ubuntu) => linux-lts-trusty
(Ubuntu)
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https://bugs.launchpad.net/bugs/1675996
Title:
Default nouveau video driver creates garbled display (White 24" iMac
w/ NVIDIA GeForce 7600 GT)
Status in linux-lts-trusty package in Ubuntu:
New
Bug description:
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 :01:00.0: fifo: DMA_PUSHER - ch 1 [Xorg[2121]] get
00018000 put 000180a0 state 8000 (err: INVALID_CMD) push
and
nouveau :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=
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: linux-lts-xenial
UpgradeStatus: No upgrade log present (probably fresh install)
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux-lts-trusty/+bug/1675996/+subscriptions
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