diff --git a/modules/steamos/boot.nix b/modules/steamos/boot.nix
index d0de9a38..29ab650c 100644
--- a/modules/steamos/boot.nix
+++ b/modules/steamos/boot.nix
@@ -26,10 +26,28 @@ in
     (mkIf (cfg.enableDefaultCmdlineConfig) {
       boot.kernelParams = [
         # From grub-steamos in jupiter-hw-support
-        #  - https://github.com/Jovian-Experiments/jupiter-hw-support/blob/jupiter-20231212.1/etc/default/grub-steamos
+        #  - https://github.com/Jovian-Experiments/jupiter-hw-support/blob/08fc462bd0ce0f0c198a5aed36c0bf307fcfb326/etc/default/grub-steamos
+
+        # Valve says:
+        #
+        # We set amdgpu.lockup_timeout in order to control the TDR for each ring
+        # 0 (GFX): 5s (was 10s)
+        # 1 (Compute): 10s (was 60s wtf)
+        # 2 (SDMA): 10s (was 10s)
+        # 3 (Video): 5s (was 10s)
+
+        # amdgpu.sched_hw_submission is set to 4 to avoid bubbles of lack-of work
+        # with the default (2).
+        # 4 is the maximum that is supported across RDNA2 + RDNA3.
+        # Any more results in a hang at startup on RDNA3.
+        "log_buf_len=4M"
         "amd_iommu=off"
+        "amdgpu.lockup_timeout=5000,10000,10000,5000"
         "amdgpu.gttsize=8128"
+        "amdgpu.sched_hw_submission=4"
         "audit=0"
+        "fbcon=vc:4-6"
+        "fbcon=rotate:1"
       ];
     })
   ];
diff --git a/pkgs/jupiter-hw-support/src.nix b/pkgs/jupiter-hw-support/src.nix
index cc8bd69f..345f2643 100644
--- a/pkgs/jupiter-hw-support/src.nix
+++ b/pkgs/jupiter-hw-support/src.nix
@@ -8,13 +8,13 @@
 
 stdenv.mkDerivation rec {
   pname = "jupiter-hw-support-source";
-  version = "20240624.1";
+  version = "20240827.1";
 
   src = fetchFromGitHub {
     owner = "Jovian-Experiments";
     repo = "jupiter-hw-support";
     rev = "jupiter-${version}";
-    hash = "sha256-G0N1iWquhj93x9QCy8U68TM380FWPc6uJZtrExdBQaY=";
+    hash = "sha256-8/ddym6Onx4VwLY50GYw3iqTOJuFh2px/+63eHS2KJE=";
   };
 
   patches = [