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Fix reload freeze when not modsetting current mode

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This fixes the issue of the display freezing on reload with
wlroots#1545.

On master, all output configs are applied on reload. This may cause an
output to have its config applied up to three times, instead of just
once. The three cases are: output name, output identifier, and wildcard.
Not only is this inefficient, but it can cause swaybg to be spawned and
immediately killed.

However, swaybg requires two roundtrips of wl_display (to obtain needed
globals) before it enters its normal event loop. Modesetting will
roundtrip the wl_display. Without modesetting, waitpid for killing
swaybg could block infinitely due to swaybg being blocked by
wl_display_roundtrip.

This only configured an output once. It either uses the wildcard config
or creates an empty wildcard config and applies that. This also fixes a
bug where an output would not be reset when there is no output config to
apply to it.
This commit is contained in:
Brian Ashworth 2019-02-16 16:14:27 -05:00 committed by emersion
parent 0bafc55176
commit 272ca06171
3 changed files with 15 additions and 3 deletions
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2
include/sway/config.h
View file

@ -586,6 +586,8 @@ struct output_config *store_output_config(struct output_config *oc);
void apply_output_config_to_outputs(struct output_config *oc);
void reset_outputs(void);
void free_output_config(struct output_config *oc);
int workspace_output_cmp_workspace(const void *a, const void *b);

5
sway/config.c
View file

@ -471,9 +471,8 @@ bool load_main_config(const char *file, bool is_active, bool validating) {
}
if (is_active) {
for (int i = 0; i < config->output_configs->length; i++) {
apply_output_config_to_outputs(config->output_configs->items[i]);
}
reset_outputs();
config->reloading = false;
if (config->swaynag_config_errors.pid > 0) {
swaynag_show(&config->swaynag_config_errors);

11
sway/config/output.c
View file

@ -391,6 +391,17 @@ void apply_output_config_to_outputs(struct output_config *oc) {
}
}
void reset_outputs(void) {
struct output_config *oc = NULL;
int i = list_seq_find(config->output_configs, output_name_cmp, "*");
if (i >= 0) {
oc = config->output_configs->items[i];
} else {
oc = store_output_config(new_output_config("*"));
}
apply_output_config_to_outputs(oc);
}
void free_output_config(struct output_config *oc) {
if (!oc) {
return;