| 2 Dec 2025 |
 niklaskorz | I mean you can also check out lstopo right now :D | 16:11:04 |
 Sean | oh okay. thanks. should I leave amd_3d_vcache as one of the modules I manually load? | 16:11:39 |
 K900 | No | 16:12:10 |
| K900 | I have no idea where you got that but no | 16:12:10 |
| Sean | I just put it in with kvm-amd and ntsync because I thought they wouldn't be loaded otherwise | 16:12:44 |
| niklaskorz | config AMD_3D_VCACHE
tristate "AMD 3D V-Cache Performance Optimizer Driver"
depends on X86_64 && ACPI
help
The driver provides a sysfs interface, enabling the setting of a bias
that alters CPU core reordering. This bias prefers cores with higher
frequencies or larger L3 caches on processors supporting AMD 3D V-Cache
technology.
If you choose to compile this driver as a module the module will be
called amd_3d_vcache.
| 16:14:25 |
| niklaskorz | so yeah there's no need to load this module for your CPU | 16:14:31 |
| 3 Dec 2025 |
|  Gus joined the room. | 12:27:20 |
|  @zerodya:beeper.com left the room. | 12:36:17 |
 gshpychka | Download IMG_2496.MOV | 16:55:12 |
| gshpychka | hey guys. I'm having trouble to set up jovian with my Nvidia GPU - image is broken (different kinds of artifacts/glitching). This is only in Gamescope - when launching big picture and/or games from Plasma (i.e. desktop mode), there are no artifacts.
I've searched through here and apparently it should be working out of the box, so I must be doing something wrong...
I'm using 580 drivers with open kernel modules, my display is a 4k@144 HDR VRR panel. It happens with any resolution I choose in gamescope, with or without HDR (I don't know how to turn off VRR, though).
Here is my config: https://github.com/gshpychka/dotfiles/blob/main/machines/reaper/jovian/default.nix
https://github.com/gshpychka/dotfiles/blob/main/machines/reaper/nvidia.nix
| 16:55:31 |
| gshpychka | * hey guys. I'm having trouble with getting gamescope on jovian working with my Nvidia GPU - image is broken (different kinds of artifacts/glitching). This is only in Gamescope - when launching big picture and/or games from Plasma (i.e. desktop mode), there are no artifacts.
I've searched through here and apparently it should be working out of the box, so I must be doing something wrong...
I'm using 580 drivers with open kernel modules, my display is a 4k@144 HDR VRR panel. It happens with any resolution I choose in gamescope, with or without HDR (I don't know how to turn off VRR, though).
Here is my config: https://github.com/gshpychka/dotfiles/blob/main/machines/reaper/jovian/default.nix
https://github.com/gshpychka/dotfiles/blob/main/machines/reaper/nvidia.nix
| 16:56:34 |
| K900 | #Jovian Experiments — NixOS on your Steam Deck, and other x86 gaming devices | 17:01:57 |
| K900 | But also gamescope on raw Nvidia is not exactly well supported | 17:02:05 |
| gshpychka | K900: sure, but to what extent? I'm not ready to give up just yet | 17:19:29 |
| K900 | To an extent where upstream doesn't care and I don't have hardware to test | 17:21:58 |
| gshpychka | that doesn't tell me much about what it means in practice in terms of effort required to make it work and whether its a hopeless endeavor or worth pursuing | 17:24:33 |
| K900 | I don't know | 17:25:05 |
| gshpychka | cool. hoping someone else will | 17:25:51 |
| gshpychka | niklaskorz: this gives me hope. care to share your setup? GPU/drivers/display | 17:26:53 |
| niklaskorz | RTX 4090 on driver 580.105.08 connected to a 3840x2160@120Hz TV over HDMI 2.1 | 17:28:43 |
| niklaskorz | variable refresh rate and HDR enabled, pretty much no issues | 17:28:55 |
| gshpychka | haha that's exactly my setup. | 17:29:12 |
| gshpychka | open kernel modules? did you specify any gamescope args? any env vars for proton/gamescope? change anything in gamescope/steam settings (developer mode?)? etc. it just doesn't work for me for some reason | 17:30:11 |
| niklaskorz | the only pain is that setting -steamos3(which is needed to get e.g. the bluetooth menu) limits the resolution to 1080p by default and you have to bump it to 4k resolution in each game's settings | 17:30:36 |
| niklaskorz | though if you don't need the bluetooth menu I'd suggest just not setting steamos3 | 17:30:47 |
| niklaskorz | I'll paste it into a gist, one sec | 17:31:42 |
| niklaskorz | https://gist.github.com/niklaskorz/a3d650a3954c7057c731fad820b69dbe | 17:34:22 |
| gshpychka | where is that set? haven't seen that in my reading | 17:34:26 |
| niklaskorz | it's included in the gist | 17:34:37 |
