# Upgrade path for Clockwork OS v0.2 **URL:** \ **Category:** Q&A\ **Created:** [December 13, 2018, 3:16pm UTC](https://forum.clockworkpi.com/t/upgrade-path-for-clockwork-os-v0-2/2111 "2018-12-13T15:16:00Z")\ **Posts on this page:** 1\ **Showing post:** 31
**Author:** ![misaki860](https://avatars.discourse-cdn.com/v4/letter/m/2bfe46/32.png) [@misaki860](https://forum.clockworkpi.com/u/misaki860)\ **Post date:** [December 19, 2018, 3:11pm UTC](https://forum.clockworkpi.com/t/upgrade-path-for-clockwork-os-v0-2/2111/31 "2018-12-19T15:11:22Z")
I have two questions about HDMI connection. The questioner’s environment is as follows. - ClockworkPI (CPI v3.1) development board - OS Image v0.2 Q1) No audio output There is no sound when connecting to HDMI. Does anyone know the solution? Q2) RetroArch’s behavior is very slow RetroArch’s behavior is very slow when connecting to HDMI. The cursor movement of MainMenu is also slow. Below is the VIDEO setting I tried. \<1\> Very slow operation _Start in Fullscreen Mode ON_ _Windowed Fullscreen Mode OFF_ \<2\> It is faster than \<1\>, but it still works slowly _Start in Fullscreen Mode OFF_ _Windowed Fullscreen Mode ON_ _Windowed Scale 2.0x_ \<3\> Smooth operation _Start in Fullscreen Mode OFF_ _Windowed Fullscreen Mode ON_ _Windowed Scale 1.0x_ How can I make it work smoothly with “full screen” or “Windowed Scale 2.0x”? --- _[View the full topic](https://forum.clockworkpi.com/t/upgrade-path-for-clockwork-os-v0-2/2111)._