On 08/26/2014 21:20, Adrian Chadd wrote: > What's the thing that needs porting? > > > > -a > I've been eyeballing these links:
http://h30434.www3.hp.com/t5/Notebook-Display-and-Video/Envy-14-display-backlight-controls-not-working-under-Linux/td-p/289176 https://bugs.launchpad.net/ubuntu/+source/linux/+bug/568611/ The Linux kernel apparently has backlight handlers and the ACPI kernel can either use the ACPI method or some "vendor" method (I think those are the handlers). I get a "Cannot find a backlight controller" error when I boot, and that code is in the radeon drm2 driver (sys/dev/drm2/radeon/radeon_acpi.c). info: [drm] Radeon Display Connectors info: [drm] Connector 0: info: [drm] LVDS-1 info: [drm] HPD1 info: [drm] DDC: 0x6530 0x6530 0x6534 0x6534 0x6538 0x6538 0x653c 0x653c info: [drm] Encoders: info: [drm] LCD1: INTERNAL_UNIPHY2 info: [drm] LCD1: TRAVIS info: [drm] Connector 1: info: [drm] HDMI-A-1 info: [drm] HPD3 info: [drm] DDC: 0x6550 0x6550 0x6554 0x6554 0x6558 0x6558 0x655c 0x655c info: [drm] Encoders: info: [drm] DFP1: INTERNAL_UNIPHY info: [drm] Internal thermal controller without fan control info: [drm] radeon: power management initialized info: [drm] fb mappable at 0xE114C000 info: [drm] vram apper at 0xE0000000 info: [drm] size 4325376 info: [drm] fb depth is 24 info: [drm] pitch is 5632 fbd0 on drmn0 VT: Replacing driver "vga" with new "fb". error: [drm:pid0:radeon_acpi_init] *ERROR* Trying encoder 0xfffff80007465400... error: [drm:pid0:radeon_acpi_init] *ERROR* Found LCD support. error: [drm:pid0:radeon_acpi_init] *ERROR* Trying encoder 0xfffff80007465000... error: [drm:pid0:radeon_acpi_init] *ERROR* Trying encoder 0xfffff80007329e00... error: [drm:pid0:radeon_acpi_init] *ERROR* Cannot find a backlight controller info: [drm] Initialized radeon 2.29.0 20080528 vgapci0: Boot video device (I added the *ERROR* lines to debug). It looks like the Linux changes mentioned in the 2nd link would go in there...but I gave up looking at it until I had more spare time. Anthony _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-acpi To unsubscribe, send any mail to "[email protected]"
