On 2021-04-12 11:43 +0200, Tim Tassonis via blfs-dev wrote:
> 
> 
> On 4/12/21 11:35 AM, Tim Tassonis via blfs-dev wrote:
> > 
> > 
> > On 4/12/21 11:16 AM, Pierre Labastie via blfs-dev wrote:
> > > On Mon, 2021-04-12 at 09:46 +0200, Tim Tassonis via blfs-dev wrote:
> > > > Hi all
> > > > 
> > > > I just tried to upgrade my qemu virtual machine to glib 2.68.0, which
> > > > lead to lxdm/X not starting anymore. /var/log/lxdm.log reports:
> > > > 
> > > > MESA-LOADER: failed to open bochs-drm:
> > > > /opt/X11/lib/dri/bochs-drm_dri.so: cannot open shared object file: No
> > > > such file or directory (search paths /opt/X11/lib/dri)
> > > > failed to load driver: bochs-drm
> > > > 
> > > > 
> > > > The file /opt/X11/lib/dri/bochs-drm_dri.so really does not exist, but
> > > > with older glib (2.66.8) this is no problem.
> > > > 
> > > > A downgrade to glib 2.66.8 does actually fix the problem, so glib 2.68.0
> > > > really seems to be the problem here. I will try to investigate further,
> > > > but for the moment, I would advise people to stay away from glib 2.68.0,
> > > > at least on qemu vm's running X.
> > > 
> > > Just to be sure: the VM has been updated, but the host has not been 
> > > touched (no
> > > upgrade of glib2/qemu/whatever on host).
> > 
> > 
> > Correct. I now read a bit about that bochs thingy, it seems to get 
> > triggered by
> > 
> > qemu -vga std
> > 
> > 
> > I now switched to
> > 
> > qemu -vga virtio
> > 
> > which makes the message disappear. However, lxdm still fails to start. 
> > dmesg now shows:
> > 
> > 
> > [    9.140449] lxdm-greeter-gt[2868]: segfault at 0 ip 00007f0b73b4c73d 
> > sp 00007ffefc16b600 error 4 in libglib-2.0.so.0.6800.0[7f0b73b21000+87000]
> > [    9.140460] Code: 49 8a 02 00 49 89 c6 48 85 c0 0f 84 0e 03 00 00 f6 
> > 43 2c 02 75 48 8b 53 30 48 8b 43 38 85 d2 75 09 48 85 c0 0f 84 e4 03 00 
> > 00 <48> 8b 38 48 85 ff 0f 84 f9 02 00 00 bd 08 00 00 00 eb 15 48 8b 43
> > 
> > 
> > So, there seems to be an incompatibility with glib 2.68.0 and lxdm. I 
> > try to re-build lxdm with glib 2.68.0 and see if that fixes the problem. 
> > If not, I have to revert back to 2.66.8 again.
> 
> 
> 
> I re-built lxdm with glib 2.68.0, it didn't help, so the problem clearly 
> lies with lxdm/latest glib, tne bochs thing probably just was a warning 
> and not the cause of the error. I assume therefore, it is not related to 
> qemu at all, but only to lxdm. I try to find out something on lxdm 
> forums or whatever, maybe there's a patch.

Maybe there is a bug in glib-2.68.0.  Try 2.68.1?
-- 
Xi Ruoyao <xry...@mengyan1223.wang>
School of Aerospace Science and Technology, Xidian University

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