Add yet another knob to tweak to no effect

1 files changed, 14 insertions, 4 deletions

diff --git a/guides/sysadmin/machines/amdahl30/killing-time.org b/guides/sysadmin/machines/amdahl30/killing-time.org
index be38736..611b8cb 100644
--- a/guides/sysadmin/machines/amdahl30/killing-time.org
+++ b/guides/sysadmin/machines/amdahl30/killing-time.org
@@ -282,6 +282,15 @@ not overwork it to death?
 - Peeked at [[https://github.com/HansKristian-Work/vkd3d-proton/blob/master/.github/ISSUE_TEMPLATE/bug_report.md][vkd3d-proton's issue template]] and idly ran with
   ~PROTON_LOG=1~.  Over the course of 30 seconds or so, the log file
   gets flooded with 3MB's worth of =trace:unwind:dump_unwind_info= 🤨
+
+- VRAM usage is always close to full, even when not playing games.
+  "At rest", the Plasma shell consumes ≈410MB over 512MB available.
+  - [[https://forum.kde.org/viewtopic.php%3Ff=111&t=165779.html][Lissanro reported]] in 2020 that changing Plasma's rendering backend
+    to /Software/ freed up some VRAM.
+  - Indeed, bringing up the Plasma Renderer menu, switching to
+    /Software/, logging out & back in frees up some VRAM.  It also
+    yields compositing glitches 🤷
+  - More to the point, /it has no effect on the symptoms in-game/.
 * This is insane
 Selected subset of moving parts; "testability" considering ease of
 clean reverts:
@@ -300,10 +309,11 @@ clean reverts:
 That's looking at software packages as individual blackboxes;
 config-wise, worth noting:
 
-| Part       | Testability       |
-|------------+-------------------|
-| AMD pstate | 😬 UEFI roundtrip |
-| sysfs      | OK                |
+| Part            | Testability        |
+|-----------------+--------------------|
+| AMD pstate      | 😬 UEFI roundtrip |
+| sysfs           | OK                 |
+| Plasma Renderer | OK                 |
 
 Let's throw in: