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Fallback to other output modes if preferred mode fails

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Sometimes the preferred mode is not available due to hardware
constraints (e.g. GPU or cable bandwidth limitations). In these
cases it's better to fallback to lower modes than to end up with
a black screen.
This commit is contained in:
Simon Ser 2021-07-30 23:00:10 +02:00
parent 6ffa4b1f70
commit fe09886a57
1 changed files with 20 additions and 2 deletions
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22
sway/config/output.c
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@ -357,8 +357,26 @@ static void queue_output_config(struct output_config *oc,
set_mode(wlr_output, oc->width, oc->height, set_mode(wlr_output, oc->width, oc->height,
oc->refresh_rate, oc->custom_mode == 1); oc->refresh_rate, oc->custom_mode == 1);
} else if (!wl_list_empty(&wlr_output->modes)) { } else if (!wl_list_empty(&wlr_output->modes)) {
struct wlr_output_mode *mode = wlr_output_preferred_mode(wlr_output); sway_log(SWAY_DEBUG, "Set preferred mode");
wlr_output_set_mode(wlr_output, mode); struct wlr_output_mode *preferred_mode =
wlr_output_preferred_mode(wlr_output);
wlr_output_set_mode(wlr_output, preferred_mode);
if (!wlr_output_test(wlr_output)) {
sway_log(SWAY_DEBUG, "Preferred mode rejected, "
"falling back to another mode");
struct wlr_output_mode *mode;
wl_list_for_each(mode, &wlr_output->modes, link) {
if (mode == preferred_mode) {
continue;
}
wlr_output_set_mode(wlr_output, mode);
if (wlr_output_test(wlr_output)) {
break;
}
}
}
} }
if (oc && (oc->subpixel != WL_OUTPUT_SUBPIXEL_UNKNOWN || config->reloading)) { if (oc && (oc->subpixel != WL_OUTPUT_SUBPIXEL_UNKNOWN || config->reloading)) {