dpkg -l x\* | grep 6.9.0.dfsg

ii  xfonts-base-transcoded           6.9.0.dfsg.1-6       standard fonts for X (transcoded from ISO 10
rc  xlibosmesa4                      6.9.0.dfsg.1-4       Mesa off-screen rendering library [X.Org]
ii  xlibs                            6.9.0.dfsg.1-6       X Window System client libraries metapackage
rc  xserver-common                   6.9.0.dfsg.1-4       files and utilities common to all X servers