<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
<!DOCTYPE bugzilla SYSTEM "https://bugs.webkit.org/page.cgi?id=bugzilla.dtd">

<bugzilla version="5.0.4.1"
          urlbase="https://bugs.webkit.org/"
          
          maintainer="admin@webkit.org"
>

    <bug>
          <bug_id>314190</bug_id>
          
          <creation_ts>2026-05-06 04:43:14 -0700</creation_ts>
          <short_desc>[WPEPlatform] Apply fallback to 60Hz when wpe_screen_get_refresh_rate() returns -1</short_desc>
          <delta_ts>2026-05-06 04:43:14 -0700</delta_ts>
          <reporter_accessible>1</reporter_accessible>
          <cclist_accessible>1</cclist_accessible>
          <classification_id>1</classification_id>
          <classification>Unclassified</classification>
          <product>WebKit</product>
          <component>WPE WebKit</component>
          <version>Other</version>
          <rep_platform>Unspecified</rep_platform>
          <op_sys>Unspecified</op_sys>
          <bug_status>NEW</bug_status>
          <resolution></resolution>
          
          
          <bug_file_loc></bug_file_loc>
          <status_whiteboard></status_whiteboard>
          <keywords></keywords>
          <priority>P2</priority>
          <bug_severity>Normal</bug_severity>
          <target_milestone>---</target_milestone>
          
          <blocked>265636</blocked>
          <everconfirmed>1</everconfirmed>
          <reporter name="Adrian Perez">aperez</reporter>
          <assigned_to name="Nobody">webkit-unassigned</assigned_to>
          <cc>bugs-noreply</cc>
          

      

      

      

          <comment_sort_order>oldest_to_newest</comment_sort_order>  
          <long_desc isprivate="0" >
    <commentid>2208073</commentid>
    <comment_count>0</comment_count>
    <who name="Adrian Perez">aperez</who>
    <bug_when>2026-05-06 04:43:14 -0700</bug_when>
    <thetext>Currently there are some locations in the code that do NOT check whether
wpe_screen_get_refresh_rate() returns -1, which is a sentinel value used
to indicate that the platform implementation has not provided a refresh
rate value.

I could find two call sites without checks, for example in DisplayVBlankMonitorWPE.cpp:

    return makeUnique&lt;DisplayVBlankMonitorWPE&gt;(wpe_screen_get_refresh_rate(screen) / 1000, WTF::move(observer));

and in WPEViewDRM.cpp we can end up with a negative value for priv-&gt;refreshDuration:

    priv-&gt;refreshDuration = Seconds(1 / (wpe_screen_get_refresh_rate(wpeDisplayDRMGetScreen(display)) / 1000.));</thetext>
  </long_desc>
      
      

    </bug>

</bugzilla>