Dear Maintainer, After the Debian update to 9.7.0 the same problem (“drmSetMaster(): Permission denied” error when starting X server as non-root) occurs with a VESA driver as well (at least in a Debian VM running on VirtualBox). Before
the update all worked fine (I think the latest version where we tested it was 9.5.0). The packages that got updated (with older packages all is fine, with newer packages it doesn’t work):
linux-image-4.9.0-8-amd64: 4.9.110-3+deb9u6 -> 4.9.130-2 xserver-common/xserver-xorg-core: 2:1.19.2-1+deb9u2 -> 2:1.19.2-1+deb9u5 Xorg.0.log attached. Kind regards Mikhail
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Attachment:
Xorg.0.log
Description: Xorg.0.log