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--- ubuntu:gpu:amd_gpu:monitor:manually:check_the_drm_card_number_the_gpu [2023/06/08 13:05] – peter
+++ ubuntu:gpu:amd_gpu:monitor:manually:check_the_drm_card_number_the_gpu [2023/06/10 11:03] (current) – peter
@@ Line 1: / Line 1: @@
 ====== Ubuntu - GPU - AMD GPU - Monitor - Manually - Check the DRM card number the GPU ======
-DRM (Direct Rendering Manager) is a subsystem of the Linux kernel responsible for interfacing with GPUs of modern video cards.
+**DRM** (Direct Rendering Manager) is a subsystem of the Linux kernel responsible for interfacing with GPUs of modern video cards.
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@@ Line 24: / Line 24: @@
 **NOTE:** This shows that there is only a single card, i.e. **card0**.
 </WRAP>
+<WRAP important>
+**NOTE:** Paths like **/sys/class/drm/...** are just symlinks and may change between reboots.
+  * Persistent locations can be found in **/sys/devices/**.
+    * e.g. /sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0/.
+Adjust the commands accordingly for a reliable result.
+</WRAP>
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