Bug#897975: [gdm3]

[rastersoft]

Hi:

I'm compiling it, but is there a way of easily create a .deb package 
with the compiled code? (there seems to be debian/control files, so it 
seems to be something quite straight up...)

El 14/4/19 a las 16:36, Iain Lane escribió:
> Hi,
>
> Sorry for the delay. Niels pointed me at this bug, which is suspiciously
> similar to one we saw on Ubuntu around the same time ...
>
> On Wed, Jun 13, 2018 at 01:43:18PM +0200, rastersoft wrote:
>> After several tests, I started to suspect that the problem could be in the
>> firmware loading: my hypothesis is that when I use my SSD hard disk, the
>> loading is so fast that the graphic card is still not available when GDM
>> tries to boot in Wayland mode, so it fails and tries again in X11 mode. At
>> this moment it has ended loading the firmware as is available, so this mode
>> succeeds, but without offering Wayland because that failed before. If I
>> enter a session and exit, GDM is reloaded and this time the Wayland mode
>> works because the graphics card's firmware is already loaded.
>>
>> To test this I renamed /usr/sbin/gdm3 to /usr/sbin/gdm3_bin, and created a
>> little script at /usr/sbin/gdm3 that waits 3 seconds before launching the
>> true gdm3. With this quick and dirty hack everything works fine: GDM3 is
>> always shown after booting, and I have Wayland available.
>>
>> Of course, this is not a true solution: the system should wait until the
>> graphics card is fully available before continuing loading, and not just
>> "add a delay". But I think it proofs that there is some kind of race
>> condition during boot.
> Your theory is right - GDM is starting up before the DRM devices that it
> needs are available, and it doesn't handle that very well. We have a
> workaround in place in Ubuntu which seems to have fixed the bug.  There
> is actually a logind boolean property "CanGraphical" for this, that was
> introduced so display managers like GDM can wait before they start up.
> But the branch to make GDM respect this property[0] isn't yet merged
> because it is a bit unreliable so far.
>
> So I cherry-picked the Ubuntu workaround to a branch on salsa. Would you
> be able to try it please? (Test built but not tried it myself yet, so
> sorry if there's some stupid mistake.)
>
>    https://salsa.debian.org/gnome-team/gdm/commits/wip/gdm-wait-for-drm
>
> I can't test this myself. Apparently none of my machines are capable of
> tickling this bug. :(
>
> Cheers,
>
-- 
Nos leemos
		         RASTER    (Linux user #228804)
raster at rastersoft.com              http://www.rastersoft.com