I did not realize that the -dev packages were also updated and in the proposed repository. I understood from a post above that everything would be pulled in when the libgl1-mesa-dri package was updated. I did look for -dev updates but I could not find a way to see any of the packages themselves on archive.ubuntu.com
Everything installs with no dependency issues now although working the mesa based graphics hard can still cause some problems, but no more than on other systems built before 1/4/2018.
I did not realize that the -dev packages were also updated and in the proposed repository. I understood from a post above that everything would be pulled in when the libgl1-mesa-dri package was updated. I did look for -dev updates but I could not find a way to see any of the packages themselves on archive.ubuntu.com
Everything installs with no dependency issues now although working the mesa based graphics hard can still cause some problems, but no more than on other systems built before 1/4/2018.
Thanks, LP