On Tue, May 21, 2019 at 5:56 PM Mantas Mikulėnas <grawity@xxxxxxxxx> wrote:
On Tue, May 21, 2019 at 1:39 PM Germano Massullo <germano.massullo@xxxxxxxxx> wrote:Hello, Fedora / EPEL BOINC comaintainer here.
On BOINC client we have a problem. On some Linux distributions BOINC
gets loaded before the videocard drivers are loaded, so it does not
detect OpenCL/CUDA capabilities.
We cannot use graphical.target as wait condition because there can be
headless systems without graphic server so this condition cannot be
used.
What can be a good solution in your opinion?You cannot really know when *all* devices have been detected. Although, since graphics cards are probably always fixed PCI devices, maybe a limited form of `udevadm settle` (one that doesn't block the rest of boot process) would work?You can know when the *first* device has been detected. This is probably just as poor a suggestion as above, but worth a try: Add a dependency on dev-dri-card0.device (and an udev rule to apply TAG+="systemd" to drm devices).(Even crazier would be to allow BOINC to start as normal, but then *restart* it as soon as the first GPU driver has been loaded.)
Actually, maybe having udev trigger BOINC startup would be a good option? After all that's how BlueZ already works -- it doesn't go in multi-user.target, it has WantedBy=bluetooth.target and there's an udev rule that makes every Bluetooth device pull in bluetooth.target as a dependency. And that's already an official systemd thing, too.
Mantas Mikulėnas
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