https://bugzilla.kernel.org/show_bug.cgi?id=201585
Bug ID: 201585 Summary: 144Hz 2560x1440 no longer works (caps at 120Hz) Product: Drivers Version: 2.5 Kernel Version: 4.18 Hardware: All OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: Video(DRI - non Intel) Assignee: drivers_video-dri@kernel-bugs.osdl.org Reporter: dan@acristinii.com Regression: No
Using the default driver on Ubuntu 18.10 starting from the 4.18 kernel and up, results in the maximum frame rate being limited to 120Hz at 2560x1440. Downgrading to 4.17.19 increases it back to 144Hz.
sudo lshw -c video, *-display description: VGA compatible controller product: Vega 10 XT [Radeon RX Vega 64] vendor: Advanced Micro Devices, Inc. [AMD/ATI] physical id: 0 bus info: pci@0000:28:00.0 version: c1 width: 64 bits clock: 33MHz capabilities: pm pciexpress msi vga_controller bus_master cap_list rom configuration: driver=amdgpu latency=0 resources: irq:70 memory:e0000000-efffffff memory:f0000000-f01fffff ioport:e000(size=256) memory:fe600000-fe67ffff memory:fe680000-fe69ffff