** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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https://bugs.launchpad.net/bugs/1876835
Title:
[amdgpu] black screen before login on 5.4 kernel, but iommu=soft fixes
it
Status in linux package in Ubuntu:
Confirmed
Bug description:
Black screen after grub menu, selected kernel 5.4.0-29-generic and
can't login, have to shut down laptop by pressing power button, or Alt
+ SysRq + REISUB(O), and when those dont work a hard power off.
I have installed linux-signed-oem-5.6 and ppa.launchpad.net/oibaf
/graphics-drivers/ubuntu as a workaround the this problem
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: gdm3 3.34.1-1ubuntu1
ProcVersionSignature: Ubuntu 5.4.0-29.33-generic 5.4.30
Uname: Linux 5.4.0-29-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Tue May 5 01:25:40 2020
InstallationDate: Installed on 2020-05-03 (1 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
SourcePackage: gdm3
UpgradeStatus: No upgrade log present (probably fresh install)
mtime.conffile..etc.gdm3.custom.conf: 2020-05-04T14:16:57.900775
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ProblemType: Bug
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: d 11805 F.... pulseaudio
/dev/snd/controlC0: d 11805 F.... pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
DistroRelease: Ubuntu 20.04
InstallationDate: Installed on 2020-05-03 (4 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
MachineType: LENOVO 81NB
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
Package: linux (not installed)
ProcFB: 0 EFI VGA
ProcKernelCmdLine: BOOT_IMAGE=/BOOT/ubuntu_j8up1k@/vmlinuz-5.4.0-29-generic
root=ZFS=rpool/ROOT/ubuntu_j8up1k ro recovery nomodeset
ProcVersionSignature: Ubuntu 5.4.0-29.33-generic 5.4.30
RelatedPackageVersions:
linux-restricted-modules-5.4.0-29-generic N/A
linux-backports-modules-5.4.0-29-generic N/A
linux-firmware 1.187
Tags: focal
Uname: Linux 5.4.0-29-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 07/25/2019
dmi.bios.vendor: LENOVO
dmi.bios.version: AMCN25WW(V1.08)
dmi.board.asset.tag: NO Asset Tag
dmi.board.name: LNVNB161216
dmi.board.vendor: LENOVO
dmi.board.version: SDK0R32866 WIN
dmi.chassis.asset.tag: NO Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Lenovo IdeaPad S340-14API
dmi.modalias:
dmi:bvnLENOVO:bvrAMCN25WW(V1.08):bd07/25/2019:svnLENOVO:pn81NB:pvrLenovoIdeaPadS340-14API:rvnLENOVO:rnLNVNB161216:rvrSDK0R32866WIN:cvnLENOVO:ct10:cvrLenovoIdeaPadS340-14API:
dmi.product.family: IdeaPad S340-14API
dmi.product.name: 81NB
dmi.product.sku: LENOVO_MT_81NB_BU_idea_FM_IdeaPad S340-14API
dmi.product.version: Lenovo IdeaPad S340-14API
dmi.sys.vendor: LENOVO
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