| What | Removed | Added |
|---|---|---|
| CC | root.main@gmail.com |
Comment # 3
on bug 107947
from Kent Ross
I have this issue, or one very like it. I have a system with both a Vega64 and a GTX 980ti. The 980ti is controlled by the vfio-pci driver (preempting nouveau, nvidiafb, etc. on boot) and is therefore not in use by this host system. If a display is plugged into the 980ti at boot time, booting will always fail with a black screen and more failures from drm. If a display is not plugged in, booting will almost always work without a problem, with fewer errors from drm. Even with no display plugged into the 980ti, when the system's displays (plugged into the vega64) resume when they have been sleeping (such as on the lock screen) there is a substantial chance all displays will be completely black and drm failures can be seen in dmesg. If a display is plugged into the 980ti when the main displays wake, the outcome is much less likely to be good. In the case where the system is returning from sleeping screens it fortunately does not fully necessitate a complete reboot, as the displays will sleep again in a few seconds and it can be tried again until success. Nonetheless, as this system is intended to be used as a VM host with a passed-through monitor, this bug is a showstopper. I have full dmesg logs from boot to an unusable black screen, and from boot to a login screen.
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