Hello Joseph,
*A) Current configuration:*
This is happening with the Precise Pangolin (12.04.5 LTS) and Trusty Tahir
(14.04.5 LTS) I*nstall Discs* on a White 24" iMac A1200.
I am using the following Install Disc image: http://cdimage.ubuntu.
com/releases/14.04/release/ubuntu-14.04.5-server-amd64+mac.iso
The video card in question is an *NVIDIA GeForce 7600GT* graphics
processor with
256 MB of GDDR3 SDRAM using PCI Express.
It is also happening with:
- Ubuntu (Trusty Tahir) - standard, alternative, net install
- Ubuntu (Xenial Xerus) - standard, alternative, net install
- Ubuntu (Mitaka) - standard, alternative, net install
The incident is fully documented at:
http://mymanthemaker.blogspot.hk/2017/03/getting-white-24-
core-2-duo-imac-to.html
The steps I have taken so far to obtain a working system is docmented at:
http://mymanthemaker.blogspot.hk/2017/03/imac-ubuntu-install-gone-wrong-install.html
http://mymanthemaker.blogspot.hk/2017/03/imac-ubuntu-install-gone-wrong-install_22.html
The nouveau driver family in question is:
NV40GeForce 6, *GeForce 7*Curie
NV4B(G73) GeForce 7300 GT, *7600* (GS, GT, Go, Go GT), 7700 Go Quadro FX
(550M, 560, 560M)
The error(s) I am seeing are:
[ 34.295856] nouveau :01:00.0: fifo: CACHE_ERROR - ch 0 [DRM] subc 3
mthd 0df8 data
[ 34.297536] nouveau :01:00.0: fifo: CACHE_ERROR - ch 0 [DRM] subc 3
mthd 0dfc data
[ 33.691722] nouveau :01:00.0: fifo: DMA_PUSHER - ch 0 [DRM] get
808c put 7d88 state 80006e00 (err: INVALID_CMD) push 0001
[ 33.620013] nouveau :01:00.0: DRM: GPU lockup - switching to
software fbcon
[19993.568062] nouveau :01:00.0: DRM: Calling LVDS script 6:
[19993.568067] nouveau :01:00.0: DRM: 0xC165: Parsing digital output
script table
*B) Test new kernel:*
I can test the latest kernel, sure.
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
On Tue, Mar 28, 2017 at 4:46 AM, Joseph Salisbury <
joseph.salisb...@canonical.com> wrote:
> Did this issue start happening after an update/upgrade? Was there a
> prior kernel version where you were not having this particular problem?
>
> Would it be possible for you to test the latest upstream kernel? Refer
> to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
> v4.11 kernel[0].
>
> If this bug is fixed in the mainline kernel, please add the following
> tag 'kernel-fixed-upstream'.
>
> If the mainline kernel does not fix this bug, please add the tag:
> 'kernel-bug-exists-upstream'.
>
> Once testing of the upstream kernel is complete, please mark this bug as
> "Confirmed".
>
>
> Thanks in advance.
>
> [0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.11-rc4
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> 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-co
> re-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)
>
> T
