diff --git a/core/libs/prx/libSceAgcDriver/Graphics/src/State.cpp b/core/libs/prx/libSceAgcDriver/Graphics/src/State.cpp
index dd8f4a511..00933aaef 100644
--- a/core/libs/prx/libSceAgcDriver/Graphics/src/State.cpp
+++ b/core/libs/prx/libSceAgcDriver/Graphics/src/State.cpp
@@ -1102,12 +1102,15 @@ std::optional<ColorMetadataPass> DecodeColorMetadataPass(const QueueState& queue
     if (control == cx.end()) return std::nullopt;
     const auto mode = (control->second >> 4u) & 7u;
     const auto aaConfig = find(cx, 0x2f8);
-    const bool resolve = mode == 3u && aaConfig != cx.end() && (aaConfig->second & 7u) != 0;
+    const bool rasterizerSamples = aaConfig != cx.end() && (aaConfig->second & 7u) != 0;
+    const auto sourceAttrib = find(cx, 0x31d);
+    const bool sourceSamples = sourceAttrib != cx.end() && ((sourceAttrib->second >> 12u) & 7u) != 0;
+    const bool resolve = mode == 3u && (rasterizerSamples || sourceSamples);
     if (mode != 2u && mode != 6u && !resolve) return std::nullopt;
     ColorMetadataPass pass{resolve ? ColorMetadataPass::Mode::Resolve : mode == 2u ? ColorMetadataPass::Mode::EliminateFastClear : ColorMetadataPass::Mode::DccDecompress, {}, std::nullopt};
     Require((control->second & ~0x70u) == 0xcc0000u, "CB metadata pass with a nonstandard ROP, dual quads disabled or degamma");
     Require(depthPlanesAbsent(cx) || ((read(cx, 0x200) & 0xfu) == 0 && (read(cx, 0x0) & 0xfu) == 0), "CB metadata pass with depth or stencil work");
-    const auto samples = resolve ? decodeSamples(cx) : 1u;
+    const auto samples = resolve && rasterizerSamples ? decodeSamples(cx) : 1u;
     if (!resolve) zero(cx, 0x2f8, ~0u, "multisampling or coverage conversion");
     zero(cx, 0x80, ~0u, "window offset");
     const auto viewportControl = read(cx, 0x206);
@@ -1131,7 +1134,7 @@ std::optional<ColorMetadataPass> DecodeColorMetadataPass(const QueueState& queue
     if (resolve) {
         const auto source = DecodeColorBuffer(cx, 0);
         const auto destination = DecodeColorBuffer(cx, 1);
-        Require(source.samples == samples, "CB resolve from a target whose sample count differs from the rasterizer's");
+        Require(samples == 1 || source.samples == samples, "CB resolve from a target whose sample count differs from the rasterizer's");
         Require(destination.samples == 1, "CB resolve into a multisampled target is unsupported");
         Require(destination.cmaskAddress == 0, "CB resolve into a fast-clear color target is unsupported (the resolve does not update its CMASK)");
         Require(source.format == destination.format && source.extent.width == destination.extent.width && source.extent.height == destination.extent.height, "CB resolve between different formats or extents is unsupported");
diff --git a/core/libs/prx/libSceAgcDriver/tests/Graphics.cpp b/core/libs/prx/libSceAgcDriver/tests/Graphics.cpp
index fcc2e665c..5facf38db 100644
--- a/core/libs/prx/libSceAgcDriver/tests/Graphics.cpp
+++ b/core/libs/prx/libSceAgcDriver/tests/Graphics.cpp
@@ -2107,6 +2107,15 @@ void multisampleTests() {
     setCmaskAddress(queue, 1);
     auto pass = DecodeColorMetadataPass(queue);
     Require(pass.has_value() && pass->mode == ColorMetadataPass::Mode::Resolve && pass->source.has_value() && pass->source->samples == 2 && pass->targets.size() == 1 && pass->targets[0].samples == 1, "a CB resolve of a multisampled target did not decode");
+    const auto rasterizedResolve = queue;
+    queue.context[0x2f8] = 0;
+    pass = DecodeColorMetadataPass(queue);
+    Require(pass.has_value() && pass->mode == ColorMetadataPass::Mode::Resolve && pass->source.has_value() && pass->source->samples == 2 && pass->targets.size() == 1, "a CB resolve with a single-sample rasterizer did not take its sample count from the source target");
+    queue = rasterizedResolve;
+    queue.context[0x2f8] = 0x00200002;
+    for (std::uint32_t pixel = 0; pixel < 4; ++pixel) queue.context[0x2fe + pixel * 4u] = 0x622ae6aeu;
+    expectFailure([&] { DecodeColorMetadataPass(queue); }, "differs from the rasterizer's");
+    queue = rasterizedResolve;
     queue.context[0x32b] = queue.context[0x31c] ^ (1u << 8u);
     expectFailure([&] { DecodeColorMetadataPass(queue); }, "different formats or extents");
     queue = multisampled();
diff --git a/docs/dev/debt/libSceAgcDriver.md b/docs/dev/debt/libSceAgcDriver.md
index a8909b8d0..e46d0e546 100644
--- a/docs/dev/debt/libSceAgcDriver.md
+++ b/docs/dev/debt/libSceAgcDriver.md
@@ -74,6 +74,7 @@
 - [Multisampled CMASK state](../../../core/libs/prx/libSceAgcDriver/Graphics/src/MultisampleTarget.cpp) (libSceAgcDriver) - a multisampled target has no guest texels, so its CMASK state comes from fills rather than from a read at each draw as a single-sample target's does. A fill of the whole CMASK with 0 clears the host image at the target's next use, one with 0xffffffff marks it expanded, and any other pattern, or a fill that covers only part of the CMASK, throws at the next use (inferred: main's rule that a mixed CMASK is unmodeled, applied to the one host image). A FAST_CLEAR target starts from its CMASK keys at its first use, and a COMPRESSION-only target starts expanded. Copies by DMA into the CMASK are not seen, and a later use with another CMASK address throws. The clear does not rewrite the CMASK bytes as expanded, so a new target over the same CMASK (a different extent, so a different image) seeds from them again and clears once more.
 - [Multisampled targets in CB passes](../../../core/libs/prx/libSceAgcDriver/Graphics/src/State.cpp) (libSceAgcDriver) - a CB eliminate or DCC pass over a multisampled target throws, since its texels are on the host and only a CB resolve is modeled. A CB resolve into a fast-clear destination throws: the resolve writes the destination's texels but not its CMASK, which would still read as cleared.
 - [Multisampled target guest access](../../../core/libs/prx/libSceAgcDriver/Graphics/src/MultisampleTarget.cpp) (libSceAgcDriver) - the memory a multisampled color target throws on (CPU read, DMA copy, texture or storage image read) uses fragment-aware 64 KiB render-target blocks. [AMD Addrlib's GFX10 thin-block rule](https://github.com/GPUOpen-Drivers/pal/blob/c5e800072a32f68b6ccc4422936d96167c6e0728/src/core/imported/addrlib/src/core/addrlib2.cpp#L1680-L1712) gives the block width and height from element bytes and fragment count; its [surface-size calculation](https://github.com/GPUOpen-Drivers/pal/blob/c5e800072a32f68b6ccc4422936d96167c6e0728/src/core/imported/addrlib/src/gfx10/gfx10addrlib.cpp#L4000-L4005) rounds both extents to those blocks and multiplies by element bytes and fragments. Thus a 1920x1080 4x RGBA8 surface occupies 0x1fe0000 bytes, leaving the next allocation at +0x2000000 outside the guard. The 2x and 8x block orientations differ from treating the fragments as a larger element. Console address-layout equivalence has not been measured. Other tile modes retain the conservative `max(CB bytes * samples, width * height * element bytes * samples)` bound, which may still reject a distinct allocation. Targets are kept per device for the device's lifetime, one per surface address, format, extent and sample count, and are not evicted.
+- [CB resolve sample count](../../../core/libs/prx/libSceAgcDriver/Graphics/src/State.cpp) (libSceAgcDriver) - a draw with CB_COLOR_CONTROL in resolve mode is a CB resolve when either PA_SC_AA_CONFIG or CB_COLOR0_ATTRIB.NUM_SAMPLES is multisampled, and takes its sample count from CB0. Inferred, not from documentation: PPSA36082 resolves its 4x targets with no sample count in PA_SC_AA_CONFIG, and radeonsi sets PA_SC_AA_CONFIG to 0 for a multisampled framebuffer when rasterizer multisampling and line smoothing are off.
 - [Custom MSAA sample locations](../../../core/libs/prx/libSceAgcDriver/Graphics/src/State.cpp) (libSceAgcDriver) support a uniform 1x1 pattern for 2, 4 or 8 samples through VK_EXT_sample_locations. Patterns varying across the guest's 2x2 pixel grid throw. Devices without the required sample count, four subpixel bits or the full guest coordinate range refuse custom patterns. Depth images remain in GENERAL between draws, and render passes cannot continue across pattern changes. Guest offsets retain the existing decoder's signed four-bit, sixteenth-pixel interpretation; PS5 coverage and interpolation equivalence have not been measured on hardware.
 - [DCC display buffers](../../../core/libs/prx/libSceAgcDriver/Execution/src/VulkanDevice.cpp) are presented only when all keys of the console's DCC extent agree on uncompressed or a fast-clear code, padding keys included; other keys, and register-clear keys over a pending image, throw.
 - [Storage image write-back](../../../core/libs/prx/libSceAgcDriver/Graphics/src/Texture.cpp) (libSceAgcDriver) stores the GPU results over a CPU-stamped range whose guest bytes equal the copy taken when the image's layers got their generation (images up to 1 MiB whose guest bytes were settled at that point, with no unit shadow, pending image results or recorded GPU store over them; other images keep the previous rule: the CPU's bytes win). A CPU store that rewrites the baseline value after the GPU changed it is not told apart from no store, and the GPU result wins there. The 1 MiB limit is a choice, not a console value.