ref: e7d03d19100fe3180906c8ce3f2cab3ba9387fe8
parent: 218d21f3b5743ddaddb7252b7088946a62b49244
author: qwx <qwx@sciops.net>
date: Thu Aug 18 01:33:31 EDT 2022
devvga: fix race condition between writes to vgactl
to reproduce:
for(i in `{seq 10}) echo softscreen off >/dev/vgactl