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console_login: sleep a bit before starting

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Summary:
This is a bit icky, but it's the easiest way to solve a problem
I've seen a few times, the latest case being
https://openqa.stg.fedoraproject.org/tests/1664 . In that test,
_console_wait_login logs in to tty1 as user, then uefi_
postinstall wants to switch to tty3 and log in as root. When
it does that, sometimes the check_screen loop in console_login
gets hit before the display has actually switched from tty1 to
tty3, so everything gets out of sync.

An alternative would be to have root_console check that it's
either logged in or at the correct tty before handing off to
console_login, but that starts duplicating stuff, and it breaks
in the case the target tty is logged in as a user and the login
prompt is no longer visible...

Test Plan:
Check all tests run as normal, and maybe run UEFI
tests a few times to see that the bug no longer happens (but
it's hard to reliably trigger it anyway).

Reviewers: garretraziel, jskladan

Reviewed By: jskladan

Subscribers: tflink

Differential Revision: https://phab.qadevel.cloud.fedoraproject.org/D683
This commit is contained in:
Adam Williamson 2015-12-08 08:08:15 -08:00
parent f34d01ee01
commit 520a45b7b2
1 changed files with 8 additions and 0 deletions
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8
lib/fedorabase.pm
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@ -17,6 +17,14 @@ sub console_login {
check => 1, check => 1,
@_); @_);
# There's a timing problem when we switch from a logged-in console
# to a non-logged in console and immediately call this function;
# if the switch lags a bit, this function will match one of the
# logged-in needles for the console we switched from, and get out
# of sync (e.g. https://openqa.stg.fedoraproject.org/tests/1664 )
# To avoid this, we'll sleep a couple of seconds before starting
sleep 2;
my $good = ""; my $good = "";
my $bad = ""; my $bad = "";
my $needuser = 1; my $needuser = 1;