[poky] [PATCH 1/1] qemu: Use mesa's libGL rather than nVidia's to avoid segfault of qemu

[Tian, Kevin]

> From: Mark Hatle
> Sent: Thursday, March 17, 2011 11:03 PM
> 
> I reworked the patch slightly.. It's available on poky-contrib
> mhatle/qemu-workaround.
> 
> Specifically I changed:
> - the warning message to make clarify it a bit.
> - Changed the preload to be "libGL.so", so the rt-linker will now search for it
> (/usr/lib/libGL.so may be wrong on some systems where /usr/lib64 is the
> default
> library path)

Just double confirm here. You are sure that just "libGL.so" will hit /usr/lib/libGL.so
instead of the nvidia proprietary one, right? I'm interesting how nvidia 
proprietary driver is linked to qemu binary then? I can understand why Edwin
originally use full path to make sure default one being used, but of course it may
be wrong as you said on some system.

> - Added a second check to see if the workaround worked or not, if it didn't add
> a second warning message
> - To the QEMU run line, add "stty sane" in the case of a failure.  Otherwise
> QEMU leaves the terminal/console in a confused state.
> 
> Can you please verify that this still works on the Ubuntu systems and that I
> didn't miss anything/break anything else?  If so I think this is the version we
> should go with.

Edwin is out of office in the morning, and he will confirm them once he's back.

Thanks
Kevin

> 
> --Mark
> 
> On 3/17/11 7:22 AM, Zhai Edwin wrote:
> > From: Zhai Edwin <edwin.zhai at intel.com>
> >
> > Proprietary nVidia driver introduce its own libGL that precede mesa's.
> > qemu has segfault if linked with it. This fix try to use mesa's libGL
> > if ldd find qemu linked with nVidia libGL.
> >
> > [YOCTO #649]
> > [YOCTO #698]
> >
> >
> > Signed-off-by: Zhai Edwin <edwin.zhai at intel.com>
> > ---
> >  scripts/poky-qemu-internal |   16 +++++++++++++++-
> >  1 files changed, 15 insertions(+), 1 deletions(-)
> >
> > diff --git a/scripts/poky-qemu-internal b/scripts/poky-qemu-internal
> > index 3638a65..1f09fe7 100755
> > --- a/scripts/poky-qemu-internal
> > +++ b/scripts/poky-qemu-internal
> > @@ -436,10 +436,24 @@ else
> >      echo "Warning: distccd not present, no distcc support loaded."
> >  fi
> >
> > +# qemu got segfault if linked with nVidia's libgl
> > +GL_LD_PRELOAD=$LD_PRELOAD
> > +
> > +if ldd $QEMUBIN | grep -i nvidia &> /dev/null
> > +then
> > +    echo "************** !!!Warning!!! **************
> > +    You installed nVidia's libGL.so that probably lead qemu segfault!
> > +    Pls. uninstall proprietary nVidia driver or make mesa libgl precede
> nvidia's."
> > +
> > +    # To avoid segfault of qemu, skip nVidia's libGL and use mesa's instead
> > +    echo "Skip nVidia's libGL!"
> > +    GL_LD_PRELOAD="/usr/lib/libGL.so $LD_PRELOAD"
> > +fi
> > +
> >  echo "Running $QEMU..."
> >  # -no-reboot is a mandatory option - see bug #100
> >  echo $QEMUBIN -kernel $KERNEL $QEMUOPTIONS $SERIALOPTS
> -no-reboot $SCRIPT_QEMU_OPT $SCRIPT_QEMU_EXTRA_OPT --append
> '"'$KERNCMDLINE $SCRIPT_KERNEL_OPT'"'
> > -$QEMUBIN -kernel $KERNEL $QEMUOPTIONS $SERIALOPTS -no-reboot
> $SCRIPT_QEMU_OPT $SCRIPT_QEMU_EXTRA_OPT --append "$KERNCMDLINE
> $SCRIPT_KERNEL_OPT" || /bin/true
> > +LD_PRELOAD="$GL_LD_PRELOAD" $QEMUBIN -kernel $KERNEL
> $QEMUOPTIONS $SERIALOPTS -no-reboot $SCRIPT_QEMU_OPT
> $SCRIPT_QEMU_EXTRA_OPT --append "$KERNCMDLINE
> $SCRIPT_KERNEL_OPT" || /bin/true
> >
> >  cleanup
> >
> 
> _______________________________________________
> poky mailing list
> poky at yoctoproject.org
> https://lists.yoctoproject.org/listinfo/poky