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Bug 921857 - Alsamixer - High CPU utilization when started without terminal
Summary: Alsamixer - High CPU utilization when started without terminal
Keywords:
Status: CLOSED CURRENTRELEASE
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: alsa-utils
Version: 7.0
Hardware: Unspecified
OS: Linux
medium
low
Target Milestone: alpha
: ---
Assignee: Jaroslav Kysela
QA Contact: Desktop QE
URL:
Whiteboard:
Depends On: 921855 1148479
Blocks:
TreeView+ depends on / blocked
 
Reported: 2013-03-15 06:43 UTC by Robin Hack
Modified: 2015-10-19 06:44 UTC (History)
1 user (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of: 921855
Environment:
Last Closed: 2013-07-31 18:51:30 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)

Description Robin Hack 2013-03-15 06:43:05 UTC 
+++ This bug was initially created as a clone of Bug #921855 +++

Description of problem:
When alsamixer is started without terminal (gnome->run application) then i've got high cpu utilization.

Version-Release number of selected component (if applicable):
alsa-utils-1.0.26-1.el7.x86_64


How reproducible:
always

Steps to Reproduce:
1. run alsamixer without terminal
  
Actual results:
High cpu utilization

Expected results:
No cpu utilization.

Additional info:

Part of strace output.

Still repeat:
...
rt_sigaction(SIGTSTP, {SIG_IGN, [], SA_RESTORER|SA_RESTART, 0x359720f500}, {0x3599e192f0, [], SA_RESTORER|SA_RESTART, 0x359720f500}, 8) = 0
select(1, [0], NULL, NULL, {0, 0})      = 1 (in [0], left {0, 0})
rt_sigaction(SIGTSTP, {0x3599e192f0, [], SA_RESTORER|SA_RESTART, 0x359720f500}, NULL, 8) = 0
poll([{fd=0, events=POLLIN}, {fd=3, events=POLLIN|POLLERR|POLLNVAL}], 2, -1) = 1 ([{fd=0, revents=POLLIN}])
rt_sigaction(SIGTSTP, {SIG_IGN, [], SA_RESTORER|SA_RESTART, 0x359720f500}, {0x3599e192f0, [], SA_RESTORER|SA_RESTART, 0x359720f500}, 8) = 0
rt_sigaction(SIGTSTP, {0x3599e192f0, [], SA_RESTORER|SA_RESTART, 0x359720f500}, NULL, 8) = 0
poll([{fd=0, events=POLLIN}, {fd=3, events=POLLIN|POLLERR|POLLNVAL}], 2, -1) = 1 ([{fd=0, revents=POLLIN}])
select(1, [0], NULL, NULL, {0, 0})      = 1 (in [0], left {0, 0})
read(0, "", 1)                          = 0
...
Comment 2 Robin Hack 2013-03-15 07:29:19 UTC 
It seems that they have problem with STDIN handling.
I wrote small repeater:
alsamixer 0>/dev/null
Comment 3 Jaroslav Kysela 2013-03-22 13:04:52 UTC 
I added a simple tty check to alsamixer:

http://git.alsa-project.org/?p=alsa-utils.git;a=commitdiff;h=5622f3b09fecbb19363db2b22b7060c27a65bb04
Comment 4 Jaroslav Kysela 2013-07-31 18:51:30 UTC 
The patch from comment#3 is in the current alsa-utils package for rhel-7. Closing..
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