xrandr: Use specified output property name for backlight control
Backlight controls are set using the "BACKLIGHT" XRANDR output property. This should be "Backlight" according to the XRANDR spec [1]. Some drivers (Intel) export both properties and some only the specified property (nvidia). Users of drivers that only export the specified property cannot change their backlight using XRANDR. [1] http://cgit.freedesktop.org/xorg/proto/randrproto/tree/randrproto.txt section 9.1 https://bugzilla.gnome.org/show_bug.cgi?id=723606
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@ -186,7 +186,7 @@ output_get_backlight_xrandr (MetaMonitorManagerXrandr *manager_xrandr,
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XRRGetOutputProperty (manager_xrandr->xdisplay,
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(XID)output->output_id,
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display->atom_BACKLIGHT,
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display->atom_Backlight,
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0, G_MAXLONG, False, False, XA_INTEGER,
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&actual_type, &actual_format,
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&nitems, &bytes_after, &buffer);
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@ -211,7 +211,7 @@ output_get_backlight_limits_xrandr (MetaMonitorManagerXrandr *manager_xrandr,
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meta_error_trap_push (display);
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info = XRRQueryOutputProperty (manager_xrandr->xdisplay,
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(XID)output->output_id,
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display->atom_BACKLIGHT);
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display->atom_Backlight);
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meta_error_trap_pop (display);
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if (info == NULL)
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@ -947,7 +947,7 @@ meta_monitor_manager_xrandr_change_backlight (MetaMonitorManager *manager,
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meta_error_trap_push (display);
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XRRChangeOutputProperty (manager_xrandr->xdisplay,
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(XID)output->output_id,
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display->atom_BACKLIGHT,
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display->atom_Backlight,
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XA_INTEGER, 32, PropModeReplace,
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(unsigned char *) &hw_value, 1);
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meta_error_trap_pop (display);
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@ -78,7 +78,7 @@ item(MULTIPLE)
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item(TIMESTAMP)
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item(VERSION)
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item(ATOM_PAIR)
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item(BACKLIGHT)
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item(Backlight)
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item(_XKB_RULES_NAMES)
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item(hotplug_mode_update)
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item(WL_SURFACE_ID)
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