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: NV40 GeForce 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 0000:01:00.0: fifo: CACHE_ERROR - ch 0 [DRM] subc 3 mthd 0df8 data ffffffff [ 34.297536] nouveau 0000:01:00.0: fifo: CACHE_ERROR - ch 0 [DRM] subc 3 mthd 0dfc data ffffffff [ 33.691722] nouveau 0000:01:00.0: fifo: DMA_PUSHER - ch 0 [DRM] get 0000808c put 00007d88 state 80006e00 (err: INVALID_CMD) push 00000001 [ 33.620013] nouveau 0000:01:00.0: DRM: GPU lockup - switching to software fbcon [19993.568062] nouveau 0000:01:00.0: DRM: Calling LVDS script 6: [19993.568067] nouveau 0000:01:00.0: 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 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) > > To manage notifications about this bug go to: > https://bugs.launchpad.net/ubuntu/+source/linux-lts-trusty/+ > bug/1675996/+subscriptions > -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-lts-trusty in Ubuntu. 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 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) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-lts-trusty/+bug/1675996/+subscriptions -- 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
