Comment 26 for bug 1821533

Our company just purchased these laptops and we could really use a fix for
them. Would you mind sharing the edid files you created to get the displays
functioning?

On Tue, Jul 9, 2019 at 17:50 Rich Drewes <email address hidden> wrote:

> I'm not sure this is a Linux problem. It may be that the panel is
> reporting bad EDID data. I haven't investigated enough to say for sure.
> In any case none of the more recent Linux releases fixed the problem in
> my tests. Also no other open source OSs were able to deal with the
> onboard LCD panel either. (That may have changed since I tested.)
>
> If you were interested, you might be able to patch the firmware on the
> onboard panel to provide different EDID information. I looked into doing
> this and there are some tutorials out there. However, it's possible you
> could do something wrong and end up worse than you were before. If you
> learn something new, please post it here. In particular if you find some
> open source OS that can configure this display properly at full
> resolution without resorting to forcing EDID information please say so
> here.
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1821533
>
> Title:
> drm fails to accept edid version 2.4
>
> Status in linux-hwe package in Ubuntu:
> Confirmed
> Status in xorg-server package in Ubuntu:
> Confirmed
>
> Bug description:
> Booting very new laptop hardware (ASUS Zenbook UX431FA) from 18.04 usb
> install (also 18.10, also 19.04 daily) leads to black screen. Adding
> "nomodeset" to kernel boot parameter gives 800x600 video only and
> permits installing OS to disk. Applying updates and hardware
> enablement packages does not solve problem: the system will still only
> boot with nomodeset kernel option, and X is limited to using fbdev
> module at 800x600 resolution.
>
> The "modesetting" driver appears to be loaded and then unloaded during
> X startup. Trying to force intel module from xserver-xorg-video-intel
> by setting up 20-intel.conf file in /usr/share/X11/xorg.conf.d/ does
> not help.
>
> The PCI id for the graphics device appears to be 3ea0 and the place
> where that might be relevant is the i915 module.
>
> This problem occurs with every other Linux release I have tried
> including Fedora 29, Elementary OS latest, Mint 19.1, Manjaro latest.
> The one open source OS that I have found where it might be fixed is
> DragonFlyBSD (see https://bugs.dragonflybsd.org/issues/3167). I have
> verified that the patch referenced in that bug report does make
> DragonFlyBSD boot past the video problem which I think is the same
> problem I experience with every Linux OS I have tried including
> Ubuntu.
>
> guest@guest-ZenBook-UX431FA:~$ lsb_release -rd
> Description: Ubuntu 18.04.2 LTS
> Release: 18.04
>
> guest@guest-ZenBook-UX431FA:~$ dpkg -l | grep hwe | egrep "linux|fbdev"
> ii linux-generic-hwe-18.04 4.18.0.16.66
> amd64 Complete Generic Linux kernel and headers
> ii linux-headers-generic-hwe-18.04 4.18.0.16.66
> amd64 Generic Linux kernel headers
> ii linux-image-generic-hwe-18.04 4.18.0.16.66
> amd64 Generic Linux kernel image
> ii linux-signed-generic-hwe-18.04 4.18.0.16.66
> amd64 Complete Signed Generic Linux kernel and
> headers (dummy transitional package)
> ii xserver-xorg-video-fbdev-hwe-18.04 1:0.5.0-1ubuntu1~18.04.1
> amd64 X.Org X server -- fbdev display driver
>
> Expected result: Video at 1920x1080
> Actual result: Video limited to 800x600
>
> ProblemType: Bug
> DistroRelease: Ubuntu 18.04
> Package: xorg 1:7.7+19ubuntu7.1
> ProcVersionSignature: Ubuntu 4.18.0-16.17~18.04.1-generic 4.18.20
> Uname: Linux 4.18.0-16-generic x86_64
> ApportVersion: 2.20.9-0ubuntu7.6
> Architecture: amd64
> BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
> CompositorRunning: None
> CurrentDesktop: ubuntu:GNOME
> Date: Sun Mar 24 10:36:51 2019
> DistUpgraded: Fresh install
> DistroCodename: bionic
> DistroVariant: ubuntu
> ExtraDebuggingInterest: Yes, including running git bisection searches
> GraphicsCard:
> Intel Corporation Device [8086:3ea0] (prog-if 00 [VGA controller])
> Subsystem: ASUSTeK Computer Inc. Device [1043:17d1]
> InstallationDate: Installed on 2019-03-24 (0 days ago)
> InstallationMedia: Ubuntu 18.04.2 LTS "Bionic Beaver" - Release amd64
> (20190210)
> MachineType: ASUSTeK COMPUTER INC. ZenBook UX431FA
> ProcEnviron:
> TERM=xterm-256color
> PATH=(custom, no user)
> XDG_RUNTIME_DIR=<set>
> LANG=en_US.UTF-8
> SHELL=/bin/bash
> ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.18.0-16-generic
> root=UUID=e6ae272a-49f0-491b-99b6-2a3785a7679e ro nomodeset vt.handoff=1
> SourcePackage: xorg
> Symptom: display
> UpgradeStatus: No upgrade log present (probably fresh install)
> dmi.bios.date: 12/14/2018
> dmi.bios.vendor: American Megatrends Inc.
> dmi.bios.version: UX431FA.205
> dmi.board.asset.tag: ATN12345678901234567
> dmi.board.name: UX431FA
> dmi.board.vendor: ASUSTeK COMPUTER INC.
> dmi.board.version: 1.0
> dmi.chassis.asset.tag: No Asset Tag
> dmi.chassis.type: 10
> dmi.chassis.vendor: ASUSTeK COMPUTER INC.
> dmi.chassis.version: 1.0
> dmi.modalias:
> dmi:bvnAmericanMegatrendsInc.:bvrUX431FA.205:bd12/14/2018:svnASUSTeKCOMPUTERINC.:pnZenBookUX431FA:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnUX431FA:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
> dmi.product.family: ZenBook
> dmi.product.name: ZenBook UX431FA
> dmi.product.version: 1.0
> dmi.sys.vendor: ASUSTeK COMPUTER INC.
> version.compiz: compiz N/A
> version.libdrm2: libdrm2 2.4.95-1~18.04.1
> version.libgl1-mesa-dri: libgl1-mesa-dri 18.2.8-0ubuntu0~18.04.2
> version.libgl1-mesa-glx: libgl1-mesa-glx 18.2.8-0ubuntu0~18.04.2
> version.xserver-xorg-core: xserver-xorg-core N/A
> version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
> version.xserver-xorg-video-ati: xserver-xorg-video-ati N/A
> version.xserver-xorg-video-intel: xserver-xorg-video-intel N/A
> version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A
>
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>
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>
--
James Parris
Fmr. Staff Sergeant, U.S. Army
Grovetown, GA
Cell: (334)294-4932

"Two things are infinite: the universe and human stupidity; and I'm not
completely sure about the former." - Albert Einstein