[Expired for linux (Ubuntu) because there has been no activity for 60
days.]
** Changed in: linux (Ubuntu)
Status: Incomplete => Expired
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https://bugs.launchpad.net/bugs/1761825
Title:
amdgpu.dc fails on AMD (Kaveri) A10-7300
Status in linux package in Ubuntu:
Expired
Bug description:
Booting kernel 4.16 ( BOOT_IMAGE=/vmlinuz-4.16.0-041600-generic ) with
external monitor attached to VGA port of Lenovo Ideapad Z50-75 (AMD
Kaveri A10-7300) results in blank external display when
amdgpu.ci_support is forced (i.e. radeon disabled).
key dmesg messages are:
[ 1.897177] [drm:construct [amdgpu]] *ERROR* construct: Invalid Connector
ObjectID from Adapter Service for connector index:3! type 0 expected 3
[ 1.897266] [drm:construct [amdgpu]] *ERROR* construct: Invalid Connector
ObjectID from Adapter Service for connector index:4! type 0 expected 3
[ 1.897380] [drm:construct [amdgpu]] *ERROR* construct: Invalid Connector
ObjectID from Adapter Service for connector index:5! type 0 expected 3
[ 1.897489] [drm:construct [amdgpu]] *ERROR* construct: Invalid Connector
ObjectID from Adapter Service for connector index:6! type 0 expected 3
Kernel boot options are: amdgpu.cik_support=1 radeon.cik_support=0
If I boot the same kernel with the following options:
amdgpu.cik_support=1 radeon.cik_support=0 amdgpu.dc=0
The VGA attached display works.
Attached in the tar are:
version.log - output of cat /proc/version
lspci-vnvn.log - output of sudo lscpi -vnvn
dmesg_amdgpu.dc-(default-one) - dmesg from boot with amdgpu.cik_support
forced and amdgpu.dc left to deafult
dmesg_amdgpu.dc-0 - dmesg from boot with amdgpu.cik_support forced and
amdgpu.dc disabled
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ApportVersion: 2.20.1-0ubuntu2.15
Architecture: amd64
CurrentDesktop: LXDE
DistroRelease: Ubuntu 16.04
InstallationDate: Installed on 2017-09-05 (213 days ago)
InstallationMedia: Lubuntu 16.04.3 LTS "Xenial Xerus" - Release amd64
(20170801)
JournalErrors:
Error: command ['journalctl', '-b', '--priority=warning', '--lines=1000']
failed with exit code 1: Failed to search journal ACL: Operation not supported
No journal files were opened due to insufficient permissions.
Package: linux (not installed)
Tags: xenial
Uname: Linux 4.16.0-041600-generic x86_64
UnreportableReason: The running kernel is not an Ubuntu kernel
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip kismet libvirtd lpadmin plugdev sambashare scanner
sudo
_MarkForUpload: True
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