Re: [Bug 2139567] Re: Graphics with Intel Arc B50 Pro and Ubuntu Mate 26.04 Non-Functional

I am running 6.18.8 on a B50 Pro Arc here, and under 24.04 it is working
find, the kernel is self-compiled from kernel.org. And since that very same
kernel did not work with 26.04, I know for a fact that this is NOT a kernel
issue.

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On Fri, 6 Feb 2026, Daniel van Vugt wrote:

> Date: Fri, 06 Feb 2026 05:18:07 -0000
> From: Daniel van Vugt <2139567@bugs.launchpad.net>
> To: nanook@eskimo.com
> Subject: [Bug 2139567] Re: Graphics with Intel Arc B50 Pro and Ubuntu Mate
> 26.04 Non-Functional
>
> I assume that means the same fix is in Resolute-proposed's 6.19 kernel.
>
> ** Package changed: ubuntu => linux (Ubuntu)
>
> ** Changed in: linux (Ubuntu)
> Status: Incomplete => Fix Committed
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/2139567
>
> Title:
> Graphics with Intel Arc B50 Pro and Ubuntu Mate 26.04 Non-Functional
>
> Status in linux package in Ubuntu:
> Fix Committed
>
> Bug description:
> I upgraded my workstation which is functional under 24.04 to
> 26.04 and it worked for text but as soon as graphics tried to start
> the screen went black and there was no sync.
>
> To eliminate the potential for it simply being a local
> configuration error I burned an ISO to thumb drive of the daily build
> of Ubuntu Mate 26.04, it had the same behavior. Text OK, graphical
> mode screen goes black and no sync.
>
> I am running a custom kernel on my workstation but the USB thumb
> was with the distribution kernel. This eliminates the kernel itself
> and/or xe drivers.
>
> I removed wayland from the installation in case it was
> interfering with Xorg and tried both the mode setting kernel based
> server and xorg-xserver-video-intel server, neither worked.
>
> ProblemType: Bug
> DistroRelease: Ubuntu 24.04
> Package: xorg 1:7.7+23ubuntu3
> Uname: Linux 6.19.0-rc7 x86_64
> ApportVersion: 2.28.1-0ubuntu3.8
> Architecture: amd64
> BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
> CasperMD5CheckResult: pass
> CompositorRunning: None
> CurrentDesktop: MATE
> Date: Sun Feb 1 22:41:24 2026
> DistUpgraded: Fresh install
> DistroCodename: noble
> DistroVariant: ubuntu
> ExtraDebuggingInterest: No
> GraphicsCard:
> Subsystem: ASUSTeK Computer Inc. CoffeeLake-S GT2 [UHD Graphics 630] [1043:8694]
> Intel Corporation Device [8086:e212] (prog-if 00 [VGA controller])
> Subsystem: Intel Corporation Device [8086:1114]
> Intel Corporation Device [8086:e212] (prog-if 00 [VGA controller])
> Subsystem: Intel Corporation Device [8086:1114]
> InstallationDate: Installed on 2025-08-19 (167 days ago)
> InstallationMedia: Ubuntu-MATE 24.04.1 LTS "Noble Numbat" - Release amd64 (20240827)
> MachineType: ASUS System Product Name
> ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.19.0-rc7 root=UUID=cd1da12a-9c61-4c7c-8971-451f75d742e4 ro systemd.show_status=1 noplymouth rootflags=data=writeback intel_iommu=on iommu=pt pcie_acs_override=downstream,multifunction
> SourcePackage: xorg
> UpgradeStatus: No upgrade log present (probably fresh install)
> dmi.bios.date: 01/11/2024
> dmi.bios.release: 21.1
> dmi.bios.vendor: American Megatrends Inc.
> dmi.bios.version: 2101
> dmi.board.asset.tag: Default string
> dmi.board.name: PRIME Z390-A
> dmi.board.vendor: ASUSTeK COMPUTER INC.
> dmi.board.version: Rev 1.xx
> dmi.chassis.asset.tag: Default string
> dmi.chassis.type: 3
> dmi.chassis.vendor: Default string
> dmi.chassis.version: Default string
> dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr2101:bd01/11/2024:br21.1:svnASUS:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnPRIMEZ390-A:rvrRev1.xx:cvnDefaultstring:ct3:cvrDefaultstring:skuASUS_MB_CNL:
> dmi.product.family: To be filled by O.E.M.
> dmi.product.name: System Product Name
> dmi.product.sku: ASUS_MB_CNL
> dmi.product.version: System Version
> dmi.sys.vendor: ASUS
> version.compiz: compiz N/A
> version.libdrm2: libdrm2 2.4.125-1ubuntu0.1~24.04.1
> version.libgl1-mesa-dri: libgl1-mesa-dri 25.2.8-0ubuntu0.24.04.1
> version.libgl1-mesa-glx: libgl1-mesa-glx N/A
> version.xserver-xorg-core: xserver-xorg-core 2:21.1.12-1ubuntu1.5
> 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
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2139567/+subscriptions
>

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https://bugs.launchpad.net/bugs/2139567

Title:
Graphics with Intel Arc B50 Pro and Ubuntu Mate 26.04 Non-Functional

Status in linux package in Ubuntu:
Fix Committed

Bug description:
I upgraded my workstation which is functional under 24.04 to
26.04 and it worked for text but as soon as graphics tried to start
the screen went black and there was no sync.

To eliminate the potential for it simply being a local
configuration error I burned an ISO to thumb drive of the daily build
of Ubuntu Mate 26.04, it had the same behavior. Text OK, graphical
mode screen goes black and no sync.

I am running a custom kernel on my workstation but the USB thumb
was with the distribution kernel. This eliminates the kernel itself
and/or xe drivers.

I removed wayland from the installation in case it was
interfering with Xorg and tried both the mode setting kernel based
server and xorg-xserver-video-intel server, neither worked.

ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: xorg 1:7.7+23ubuntu3
Uname: Linux 6.19.0-rc7 x86_64
ApportVersion: 2.28.1-0ubuntu3.8
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CasperMD5CheckResult: pass
CompositorRunning: None
CurrentDesktop: MATE
Date: Sun Feb 1 22:41:24 2026
DistUpgraded: Fresh install
DistroCodename: noble
DistroVariant: ubuntu
ExtraDebuggingInterest: No
GraphicsCard:
Subsystem: ASUSTeK Computer Inc. CoffeeLake-S GT2 [UHD Graphics 630] [1043:8694]
Intel Corporation Device [8086:e212] (prog-if 00 [VGA controller])
Subsystem: Intel Corporation Device [8086:1114]
Intel Corporation Device [8086:e212] (prog-if 00 [VGA controller])
Subsystem: Intel Corporation Device [8086:1114]
InstallationDate: Installed on 2025-08-19 (167 days ago)
InstallationMedia: Ubuntu-MATE 24.04.1 LTS "Noble Numbat" - Release amd64 (20240827)
MachineType: ASUS System Product Name
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.19.0-rc7 root=UUID=cd1da12a-9c61-4c7c-8971-451f75d742e4 ro systemd.show_status=1 noplymouth rootflags=data=writeback intel_iommu=on iommu=pt pcie_acs_override=downstream,multifunction
SourcePackage: xorg
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/11/2024
dmi.bios.release: 21.1
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 2101
dmi.board.asset.tag: Default string
dmi.board.name: PRIME Z390-A
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: Default string
dmi.chassis.version: Default string
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr2101:bd01/11/2024:br21.1:svnASUS:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnPRIMEZ390-A:rvrRev1.xx:cvnDefaultstring:ct3:cvrDefaultstring:skuASUS_MB_CNL:
dmi.product.family: To be filled by O.E.M.
dmi.product.name: System Product Name
dmi.product.sku: ASUS_MB_CNL
dmi.product.version: System Version
dmi.sys.vendor: ASUS
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.125-1ubuntu0.1~24.04.1
version.libgl1-mesa-dri: libgl1-mesa-dri 25.2.8-0ubuntu0.24.04.1
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.xserver-xorg-core: xserver-xorg-core 2:21.1.12-1ubuntu1.5
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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