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I have two AMD GPU cards in my system connected to an identical pair of
older SAMSUNG monitors with native resolution of 1680x1050.
$ lspci -d ::300
0a:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Vega
10 XT [Radeon RX Vega 64] (rev c1)
42:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] RV770
[Radeon HD 4850]
The RV770 has successfully been connected to these two monitors for many
years.
Recently upgraded the motherboard and added the Vega 64 video card.
Connecting DisplayPort from the Vega 64 to one monitor and the RV770 to
the other, The Vega 64 monitor display is corrupted. See attached
picture.
I tried all the other supported modes for the monitor and the others all
work fine (1024x768, 1280x1024, etc.) Although, it is perhaps
interesting that 1680x1050 is the only 1.6:1 aspect ratio. The majority
are 4:3 with 1280x1024 (5:4) and 720x400 (9:5) the exceptions. And all
the other modes seem to display in a 4:3 subset of the pixels on the
screen.
I'll upload the /var/log/Xorg.0.log next.
Other info:
$ lsb_release -rd
Description: Linux Mint 19.1 Tessa
Release: 19.1
$ apt-cache policy xserver-xorg-video-amdgpu
xserver-xorg-video-amdgpu:
Installed: 18.0.1-1
Candidate: 18.0.1-1
Version table:
*** 18.0.1-1 500
500 http://archive.ubuntu.com/ubuntu bionic/main amd64 Packages
100 /var/lib/dpkg/status
EXPECTATION: Correct display output
ACTUAL RESULT: "Torn" display.
---
ProblemType: Bug
ApportVersion: 2.20.9-0ubuntu7.5
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/pcmC1D0p: philip 2211 F...m pulseaudio
/dev/snd/controlC1: philip 2211 F.... pulseaudio
/dev/snd/controlC0: philip 2211 F.... pulseaudio
/dev/snd/controlC2: philip 2211 F.... pulseaudio
CurrentDesktop: X-Cinnamon
DistroRelease: Linux Mint 19.1
InstallationDate: Installed on 2019-03-10 (0 days ago)
InstallationMedia: Linux Mint 19.1 "Tessa" - Release amd64 20181217
IwConfig:
lo no wireless extensions.
enp4s0 no wireless extensions.
MachineType: Gigabyte Technology Co., Ltd. X399 AORUS PRO
Package: linux (not installed)
ProcFB:
0 radeondrmfb
1 amdgpudrmfb
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.15.0-46-generic
root=UUID=14bde5f7-3295-4e41-bc36-8d22c00349f9 ro rootflags=subvol=@ quiet
splash vt.handoff=1
ProcVersionSignature: Ubuntu 4.15.0-46.49-generic 4.15.18
RelatedPackageVersions:
linux-restricted-modules-4.15.0-46-generic N/A
linux-backports-modules-4.15.0-46-generic N/A
linux-firmware 1.173.3
RfKill:
0: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
Tags: tessa
Uname: Linux 4.15.0-46-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 10/01/2018
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: F1
dmi.board.asset.tag: Default string
dmi.board.name: X399 AORUS PRO-CF
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: x.x
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: Default string
dmi.chassis.version: Default string
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvrF1:bd10/01/2018:svnGigabyteTechnologyCo.,Ltd.:pnX399AORUSPRO:pvrDefaultstring:rvnGigabyteTechnologyCo.,Ltd.:rnX399AORUSPRO-CF:rvrx.x:cvnDefaultstring:ct3:cvrDefaultstring:
dmi.product.family: Default string
dmi.product.name: X399 AORUS PRO
dmi.product.version: Default string
dmi.sys.vendor: Gigabyte Technology Co., Ltd.
** Affects: xserver-xorg-video-amdgpu (Ubuntu)
Importance: Undecided
Status: Confirmed
** Tags: apport-collected tessa
--
VEGA 64 config for 1680x1050 is incorrect
https://bugs.launchpad.net/bugs/1819383
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