Is there a way to make xorg-server to release eGPU?

[Dave Airlie]

On Mon, 19 Nov 2018 at 21:40, Michel Dänzer <michel at daenzer.net> wrote:
>
> On 2018-11-18 7:34 a.m., Qu Wenruo wrote:
> > Hi,
> >
> > Recently I got a eGPU closure which contains an RX580.
> >
> > Xorg server detects it and PRIME works mostly fine.
> >
> > However amdgpu kernel module keeps panicing the whole kernel when the
> > eGPU is disconnected, either hot plugged out or using the pci remove
> > sysfs interface.
> >
> > And rmmod amdgpu returns EBUSY.
> > So this means I can only hot plug-in, but not hot plug-out.
> >
> > I'm wondering is there anyway to make xorg-server to release amdgpu
> > usage and then unload the kernel module before hot plug out or pci remove.
>
> If you want to use displays connected to the eGPU, you're out of luck.
> Once Xorg has initialized a driver for a GPU, there's no way to unload
> it until Xorg shuts down.

USB hotplug works fine, you can remove things all day, it shouldn't be
hard to make PCI hotplug work.

though I seem to remember some problem around cursor privates making it hard.

Dave.