From mboxrd@z Thu Jan 1 00:00:00 1970 From: Clark Williams Subject: Re: 2.6.24-rt1 SSttrraannggee keyboard behaviour Date: Fri, 01 Feb 2008 10:20:19 -0600 Message-ID: <47A346C3.8070308@redhat.com> References: <10a58eee0802010706s65929d0dte10a4cde35df317f@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Cc: RT To: Uli Brueggemann Return-path: Received: from mx1.redhat.com ([66.187.233.31]:52901 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756600AbYBAQUY (ORCPT ); Fri, 1 Feb 2008 11:20:24 -0500 In-Reply-To: <10a58eee0802010706s65929d0dte10a4cde35df317f@mail.gmail.com> Sender: linux-rt-users-owner@vger.kernel.org List-ID: -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Uli Brueggemann wrote: > Hi, > > I'm trying to use 2.6.24-rt1 in combination with BruteFIR (audio). So > far everything looks fine except: > > After starting BruteFIR (which is doing its job) after a while the > keyboard responds like with double clicks. TTeerrrriibbllee. I cannot > enter a command anymore. The running BruteFIR itself still is running > stable. > The system without starting BruteFIR keeps stable. BruteFIR itself is > working fine with older kernels. Also with e.g. 2.6.24-rc3-zen3. So I > guess the realtime patch is causing this. > BTW Brutefir is using realtime priorities 1 to 4 and it also uses SCHED_FIFO. > > Any idea? > > Uli Uli, I've seen this behavior before; on my system in addition to the doubled keystrokes, cursor animations were jerky. Are you running on a 64-bit kernel, is your clocksource hpet and is vsyscall64 on? $ uname -m x86_64 $ cat /sys/devices/system/clocksource/clocksource0/current_clocksource hpet $ cat /proc/sys/kernel/vsyscall64 1 If so, try putting this into your /etc/sysctl.conf and rebooting: # vsyscall64 off kernel.vsyscall64 = 0 You could try echoing "1" into /proc/sys/kernel/vsyscall64, but with the keyboard doubling issue, it might be a problem :) Clark -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.8 (GNU/Linux) Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org iEYEARECAAYFAkejRsMACgkQHyuj/+TTEp14GgCg1PV1n23nDDJg8Bp6NTEXIUTQ iukAoK56x+wQcZ8Z+YNea8glzIe41EpA =ZKru -----END PGP SIGNATURE-----