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diff --git a/docs/changes.txt b/docs/changes.txt
index 1527da46..420c2102 100644
--- a/docs/changes.txt
+++ b/docs/changes.txt
@@ -1,3 +1,11 @@
+* changes v6.0.0 -> v6.0.x
+
+##
+## Improvements
+##
+
+- OpenCL Runtime: Reinterpret return code CL_DEVICE_NOT_FOUND from clGetDeviceIDs() as non-fatal
+
* changes v5.1.0 -> v6.0.0
##
diff --git a/src/backend.c b/src/backend.c
index 80fdbb38..7f79879f 100644
--- a/src/backend.c
+++ b/src/backend.c
@@ -5185,7 +5185,31 @@ int backend_ctx_init (hashcat_ctx_t *hashcat_ctx)
{
event_log_error (hashcat_ctx, "clGetDeviceIDs(): %s", val2cstr_cl (CL_rc));
- return -1;
+ // Special handling for CL_DEVICE_NOT_FOUND, see: https://github.com/hashcat/hashcat/issues/2455
+
+ #define IGNORE_DEVICE_NOT_FOUND 1
+
+ if (IGNORE_DEVICE_NOT_FOUND)
+ {
+ backend_ctx_t *backend_ctx = hashcat_ctx->backend_ctx;
+
+ OCL_PTR *ocl = (OCL_PTR *) backend_ctx->ocl;
+
+ const cl_int CL_err = ocl->clGetDeviceIDs (opencl_platform, CL_DEVICE_TYPE_ALL, DEVICES_MAX, opencl_platform_devices, &opencl_platform_devices_cnt);
+
+ if (CL_err == CL_DEVICE_NOT_FOUND)
+ {
+ // we ignore this error
+ }
+ else
+ {
+ return -1;
+ }
+ }
+ else
+ {
+ return -1;
+ }
}
opencl_platforms_devices[opencl_platforms_idx] = opencl_platform_devices;
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