[regression] [kernel-bug-exists-upstream] MacBookPro14,3 internal display is blank with kernel 4.18

[Larry Reaves]

After upgrading all packages and rebooting today, the internal display is blank. An external display works fine. I believe I also ran upgrades on Friday, so it was a fairly recent package. This is a MacBookPro14,3. I believe there was a kernel upgrade, not sure if there was an Xorg upgrade.

ProblemType: Bug
DistroRelease: Ubuntu 18.10
Package: xorg 1:7.7+19ubuntu8
ProcVersionSignature: Ubuntu 4.18.0-7.8-generic 4.18.5
Uname: Linux 4.18.0-7-generic x86_64
ApportVersion: 2.20.10-0ubuntu9
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Mon Sep 10 16:34:45 2018
DistUpgraded: 2018-09-05 11:35:19,089 ERROR got error from PostInstallScript ./xorg_fix_proprietary.py ([Errno 2] No such file or directory: './xorg_fix_proprietary.py': './xorg_fix_proprietary.py')
DistroCodename: cosmic
DistroVariant: ubuntu
DkmsStatus:
 applespi, 0.1, 4.17.0-9-generic, x86_64: installed
 applespi, 0.1, 4.18.0-7-generic, x86_64: installed
ExtraDebuggingInterest: Yes
GraphicsCard:
 Advanced Micro Devices, Inc. [AMD/ATI] Baffin [Radeon RX 460/560D / Pro 450/455/460/555/560] [1002:67ef] (rev c7) (prog-if 00 [VGA controller])
   Subsystem: Apple Inc. Radeon Pro 555 [106b:017a]
InstallationDate: Installed on 2018-09-05 (5 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
MachineType: Apple Inc. MacBookPro14,3
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.18.0-7-generic root=UUID=666e74b4-e3a0-4a21-ac25-36b7daa2d230 ro quiet splash vt.handoff=1
SourcePackage: xorg
Symptom: display
UpgradeStatus: Upgraded to cosmic on 2018-09-05 (5 days ago)
dmi.bios.date: 06/26/2018
dmi.bios.vendor: Apple Inc.
dmi.bios.version: MBP143.88Z.0178.B00.1806261159
dmi.board.name: Mac-551B86E5744E2388
dmi.board.vendor: Apple Inc.
dmi.board.version: MacBookPro14,3
dmi.chassis.type: 9
dmi.chassis.vendor: Apple Inc.
dmi.chassis.version: Mac-551B86E5744E2388
dmi.modalias: dmi:bvnAppleInc.:bvrMBP143.88Z.0178.B00.1806261159:bd06/26/2018:svnAppleInc.:pnMacBookPro14,3:pvr1.0:rvnAppleInc.:rnMac-551B86E5744E2388:rvrMacBookPro14,3:cvnAppleInc.:ct9:cvrMac-551B86E5744E2388:
dmi.product.family: MacBook Pro
dmi.product.name: MacBookPro14,3
dmi.product.version: 1.0
dmi.sys.vendor: Apple Inc.
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.94-1
version.libgl1-mesa-dri: libgl1-mesa-dri 18.1.5-1ubuntu1
version.libgl1-mesa-glx: libgl1-mesa-glx 18.1.5-1ubuntu1
version.xserver-xorg-core: xserver-xorg-core 2:1.20.1-1ubuntu2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:18.0.1-1build1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20171229-1build1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-3

[Larry Reaves (yrral86)]

I can confirm that this is caused by the kernel update. When booting 4.17.0-9-generic the screen works correctly.

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This change was made by a bot.

[Joseph Salisbury (jsalisbury)]

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.19 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/v4.19-rc3

[Larry Reaves (yrral86)]

kernel-bug-exists-upstream

Not sure how to add a tag.

Upstream also kills the touchpad and keyboard, but the ubuntu kernel works there.

[Larry Reaves (yrral86)]

Regression still exists with 4.19-rc5. Keyboard and touchpad are working with that version.