Created attachment 85012 drm/nv50: Fix backlight not working when PWM_DIV is uninitialised (v2)
V2 fixes the reach of this patch. >From what I can tell the PWM_DIV is simply a divider for the initial PWM clock >or something, it does not affect the scope of the duty cycle. I therefore >assume 0x5e is always a good value to set. Traces from NV50:NVA0 would help >verify whether NVIDIA always sets this value or not. This patch requires acpi_backlight=vendor to be set because it tests for the presence of a backlight by testing drm->backlight. An alternative to this test would be checking for the GPIO to be present and routed to SOR, but I wouldn't be surprised if there is at least one device that expects our driver to route it manually. How should we go about this? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/921321 Title: nouveau: dark screen after suspend/resume To manage notifications about this bug go to: https://bugs.launchpad.net/nouveau/+bug/921321/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
