On 31/07/2019 00:44, DJ Lucas via blfs-dev wrote:
> On July 30, 2019 3:54:34 PM CDT, Pierre Labastie via blfs-dev
> <[email protected]> wrote:
> IIUC above, this is because we do not have elogind in LFS, so our first build
> of dbus does not link to libsystemd (unlike in LFS-systemd). The lack of dbus
> support is inconsequential in that configuration because we are going to
> rebuild systemd later in BLFS.
>
>> There is also another thing, which bothers me: instructions for the
>> xorg
>> server are the same in both books (sysv/elogind and systemd). So, when
>> we add
>> --enable-install-setuid to xorg-server, we add it in both books. But I
>> believed it was not needed in the systemd book...
>>
> That would be my doing as I had believed that they would be the same (and
> still believe they should be, but my attempts to find the reason for the
> differences have failed me thus far), so the two variants got merged down. In
> fact, I think I am the only one who has demonstrated that a rootless Xorg is
> even possible with elogind in our group. Five consecutive builds, all
> slightly different, but logical (apparently only to me), build orders. I'd
> gotten frustrated trying to track it down, I was simply spinning my wheels,
> so I put it on the back burner (knowing that a viable workaround exists).
> I'll be testing noveau on an existing build next week to possibly eliminate
> hardware/drivers. I want to also say that I've built entirely in chroot
> already, but I'm not 100% certain on that.
>
> HTH
>
OK, I've found the error!!!!
On the Xinit page, we have:
---
sed -e '/$serverargs $vtarg/ s/serverargs/: #&/' \
-i startx.cpp
---
for the Sysv/elogind book, while we do not have this for the systemd book.
Removing the ": #" allows startx to run the server and the usual clients.
I think even the suid-wrapper is not needed! (it drops privilege anyway if
/dev/dri/card0 is KMS compatible). This can be tested by moving
/usr/libexec/Xorg.wrap to /usr/libexec/Xorg.wrap.nouse, and trying again:
startx still works.
So we can:
remove the sed on the Xinit page
remove any enable-xxx-suid switch for xorg-server (well, maybe some drivers do
need the wrapper, this has to be tested, but I do not have the hardware (intel
driver works fine without the wrapper)).
Pierre
PS: I've spend almost 24 h running the server, xinit, with gdb, playing with
xauth files, etc, before finding this stupid bug!
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