ACK: [SRU][N/P/Q:unstable][PATCH 0/3] Ubuntu 24.04+ arm64: screen resolution fixed to 1024x768 with last kernel update (LP: #2115068)

[Chia-Lin Kao (AceLan)]

On Wed, Jun 25, 2025 at 04:05:15PM +0200, Massimiliano Pellizzer wrote:
> BugLink: https://bugs.launchpad.net/bugs/2115068
> 
> [ Impact ]
> 
> Replace FB_HYPERV with DRM_HYPERV
> 
> hyperv_fb is a legacy framebuffer driver that lacks support for dynamic
> resolution changes and modern graphics stacks.
> hyperv_drm, on the other hand, provides full DRM/KMS integration, enabling
> proper display management and compatibility with modern graphics stacks.
> Disabling hyperv_fb ensures that hyperv_drm binds to the Hyper-V synthetic video
> device, avoiding conflicts and regressions in graphical environments.
> 
> [ Fix ]
> 
> Enable CONFIG_DRM_HYPERV and disable CONFIG_FB_HYPERV.
> 
> [ Test Plan ]
> 
> Start a Gen2 Ubuntu VM on Hyper-V.
> Verify that it is possible to change the resolution of the screen successfully.
> 
> [ Regression Potential ]
> 
> Disabling hyperv_fb and relying solely on hyperv_drm may introduce regressions
> in environments where DRM/KMS is unavailable. Such environments are increasingly
> uncommon, as most modern environments fully support hyperv_drm.
> 
> [ Other Info ]
> 
> The transition from FB_HYPERV to DRM_HYPERV already happened in Debian 5.17.
> 
Acked-by: Chia-Lin Kao (AceLan) <acelan.kao at canonical.com>

> 
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