LUCI Bots are unable to run Flutter desktop apps on Linux #90676
Description
When I was trying to get #89021 to work, I ran into the problem that even though the appropriate prerequisites appear to exist on LUCI bots, when I try and run desktop Flutter apps there, they either hang (when I use xvfb-run), or fail to start (when I don't use xvfb-run)
The failure with xvfb-run looks like this:
Building Linux application...
00:00 +0 -1: loading /b/s/w/ir/x/w/flutter/examples/api/integration_test/smoke_integration_test.dart [E]
TimeoutException after 0:12:00.000000: Test timed out after 12 minutes.
package:test_api/src/backend/invoker.dart 333:28 Invoker._handleError.<fn>
dart:async/zone.dart 1420:47 _rootRun
dart:async/zone.dart 1328:19 _CustomZone.run
package:test_api/src/backend/invoker.dart 331:10 Invoker._handleError
package:test_api/src/backend/invoker.dart 287:9 Invoker.heartbeat.<fn>.<fn>
dart:async/zone.dart 1428:13 _rootRun
dart:async/zone.dart 1328:19 _CustomZone.run
package:test_api/src/backend/invoker.dart 286:38 Invoker.heartbeat.<fn>
dart:async-patch/timer_patch.dart 18:15 Timer._createTimer.<fn>
dart:isolate-patch/timer_impl.dart 395:19 _Timer._runTimers
dart:isolate-patch/timer_impl.dart 426:5 _Timer._handleMessage
dart:isolate-patch/isolate_patch.dart 192:12 _RawReceivePortImpl._handleMessage
And the failure without looks like this:
Building Linux application...
Error waiting for a debug connection to observatory on Uri "null": The log reader stopped unexpectedly, or never started.
00:00 +0 -1: loading /b/s/w/ir/x/w/flutter/examples/api/integration_test/smoke_integration_test.dart [E]
TestDeviceException(Unable to start the app on the device.)
package:flutter_tools/src/test/integration_test_device.dart 61:7 IntegrationTestTestDevice.start
This test is able to run on Cirrus and on the devicelab bots, as well as run locally on a workstation.
I have limited the test to running on Windows and macOS, but it would be nice to be able to run Fluttter desktop apps on LUCI bots as well.
cc @godofredoc