Alan Coopersmith <alan.coopersm...@oracle.com> wrote: > I have no idea who decided what releases to list there as supported, but X.Org > certainly isn't supporting all those releases upstream - though some > downstream > distros may be doing so. X.Org itself is mainly maintaining the 1.20 series > now: > https://gitlab.freedesktop.org/xorg/xserver/-/branches
I figured you were on this list...thanks for replying. My question is first trying to understand what I need to get this working on Ubuntu 18.04. Currently the Xorg server is 1.19.6 and I don't see that changing until 20.04. They will still have 1 more year on 18.04 as it's a 5 year LTS I believe. First I'm just trying to understand if interfaces changed, if legacy works at all, or what the differences are so I can isolate the problem and fix it. If an input driver was brought up to 1.19.x, would it be likely to run on 1.20.x? I think I could get 1.20 on Ubuntu 19.08, do you know if that's the case? > There certainly have been driver API/ABI updates between the two: > https://www.x.org/wiki/XorgModuleABIVersions/ I saw in 1.16.x there was quite a bit of input changes, but wasn't sure how the APIs are supported. There seems to be a fairly large grey area. On top of all that, the was hacked together from another serial device, so as you might imagine it's a pretty big mess...but the good thing is there's only about 1000 LOC for the current driver. I'm trying to figure out if I might be better off starting off with a current serial input device as a template and merge their code to get a working driver on 18.04. > > The code uses xf86ReadSerial() and xf86WriteSerial(). > > Doesn't look like there's been a whole lot of change there in recent years: > https://gitlab.freedesktop.org/xorg/xserver/commits/master/hw/xfree86/os-support/shared/posix_tty.c That's good, maybe my chance is pretty good on 18.04. > Examples of input device drivers for Xorg? > > https://gitlab.freedesktop.org/xorg/driver?filter=input> ... > XFREE86_V3 code is almost 20 years out of date now, while XFREE86_V4 code > would > be closer to 15 years out of date. Thanks for that link, looks like the xf86-input-libinput might be good for me to look at. I wish I wasn't doing this, but I really needed the work...so...I'd like to try and solve this for my client. Running on an old Atom processor that is at least 10+ years old, limited on memory, etc...I've seen this movie a number of times over the years...it's kind of like a rerun...:-/ Alan
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