Ubuntu 18.04 is not booting without adding the nomodeset parameter to the linux commandline

[Lúcio Boari Fleury]

I have an DVI-I to VGA adapter on my videocard. Usually I just need to put video=1440x900 because the linux kernel fails to recognize the correct resolution, but I couldn't make it display on the screen even setting video=DVI-I:1440x900. I believe it switches to HDMI because I could experience no issues like this on my television.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-13-generic 4.15.0-13.14 [modified: boot/vmlinuz-4.15.0-13-generic]
ProcVersionSignature: hostname 4.15.0-13.14-generic 4.15.10
Uname: Linux 4.15.0-13-generic x86_64
ApportVersion: 2.20.9-0ubuntu4
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: lucio 1485 F.... pulseaudio
 /dev/snd/controlC1: lucio 1485 F.... pulseaudio
CurrentDesktop: ubuntu:GNOME
Date: Sun Apr 8 19:40:31 2018
InstallationDate: Installed on 2018-04-08 (0 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Beta amd64 (20180404)
MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
ProcFB:

ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-13-generic root=UUID=db8a4afa-dec3-45b6-a84f-9a702c6f96ad ro quiet splash nomodeset
RelatedPackageVersions:
 linux-restricted-modules-4.15.0-13-generic N/A
 linux-backports-modules-4.15.0-13-generic N/A
 linux-firmware 1.173
RfKill:
 0: phy0: Wireless LAN
  Soft blocked: no
  Hard blocked: no
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/09/2013
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P1.20
dmi.board.name: 980DE3/U3S3
dmi.board.vendor: ASRock
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP1.20:bd04/09/2013:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rn980DE3/U3S3:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.family: To Be Filled By O.E.M.
dmi.product.name: To Be Filled By O.E.M.
dmi.product.version: To Be Filled By O.E.M.
dmi.sys.vendor: To Be Filled By O.E.M.

[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 v4.16 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/v4.16

[Lúcio Boari Fleury (lucboari)]

I can confirm the issue persists with the latest linux kernel

[Lúcio Boari Fleury (lucboari)]

Technically the system boots, but nothing is displayed

[Kai-Heng Feng (kaihengfeng)]

Please file an upstream bug at https://bugs.freedesktop.org/
Product: DRI
Component: DRM/amdgpu

[Lúcio Boari Fleury (lucboari)]

https://bugs.freedesktop.org/show_bug.cgi?id=105911

[Lúcio Boari Fleury (lucboari)]

This bug is fixed on Fedora 28. I've also tested the Opensuse Tumbleweed but their distro kernel also has this bug

[Adarsh (adii00)]

Yes Ubuntu is not booting without settings nomodeset in grub, generally in Old desktop.
Working fine in my Laptop

[Lúcio Boari Fleury (lucboari)]

But Fedora also uses grub...

[Lúcio Boari Fleury (lucboari)]

It's easy to get the patches from Fedora and apply them on Ubuntu, isn't it?