Please describe your issue in as much detail as possible:
On SteamOS Preview and SteamOS Main, we now have the ability to use the frame limiter on VRR enabled displays. With the backend logic currently in the Steam client, any valid refresh rates defined in a gamescope .lua config file apply to both the non-VRR limiter and the VRR limiter.
However, this presents a problem on devices like the Legion Go S, which are capable of a wider range of frame limiting while VRR is enabled compared to while VRR is disabled. For the Go S specifically, the non-VRR range covered in https://github.com/ValveSoftware/gamescope/pull/1801 is much tighter than the 48-120Hz afforded to you in the EDID when using VRR:
Block 0, Base EDID:
EDID Structure Version & Revision: 1.4
Vendor & Product Identification:
Manufacturer: CSW
Model: 2048
Made in: 2024
Basic Display Parameters & Features:
Digital display
Bits per primary color channel: 8
DisplayPort interface
Maximum image size: 17 cm x 11 cm
Gamma: 2.20
Supported color formats: RGB 4:4:4
First detailed timing includes the native pixel format and preferred refresh rate
Display supports continuous frequencies
Color Characteristics:
Red : 0.6464, 0.3310
Green: 0.2968, 0.6191
Blue : 0.1416, 0.0507
White: 0.3046, 0.3251
Established Timings I & II: none
Standard Timings: none
Detailed Timing Descriptors:
DTD 1: 1920x1200 120.002130 Hz 16:10 151.683 kHz 315.500000 MHz (172 mm x 107 mm)
Hfront 48 Hsync 32 Hback 80 Hpol N
Vfront 54 Vsync 6 Vback 4 Vpol N
DTD 2: 1920x1200 60.001065 Hz 16:10 75.841 kHz 157.750000 MHz (172 mm x 107 mm)
Hfront 48 Hsync 32 Hback 80 Hpol N
Vfront 54 Vsync 6 Vback 4 Vpol N
Display Range Limits:
Monitor ranges (Range Limits Only): 48-120 Hz V, 152-152 kHz H, max dotclock 320 MHz
Display Product Name: 'PN8007QB1-1'
Checksum: 0xf1
but there isn't a way to access that full VRR frame limiting range without compromising the non-VRR slider values in the gamescope config.
Your system information
Please describe your issue in as much detail as possible:
On SteamOS Preview and SteamOS Main, we now have the ability to use the frame limiter on VRR enabled displays. With the backend logic currently in the Steam client, any valid refresh rates defined in a gamescope .lua config file apply to both the non-VRR limiter and the VRR limiter.
However, this presents a problem on devices like the Legion Go S, which are capable of a wider range of frame limiting while VRR is enabled compared to while VRR is disabled. For the Go S specifically, the non-VRR range covered in https://github.com/ValveSoftware/gamescope/pull/1801 is much tighter than the
48-120Hzafforded to you in the EDID when using VRR:but there isn't a way to access that full VRR frame limiting range without compromising the non-VRR slider values in the gamescope config.