So, just today I noticed a problem with kernel 2.6.18-194 (CentOS 5.5) on several Intel DP965LT systems; the system beeps (such as terminal beeps) are no longer passed through to the external speakers. This is a problem because in our situation the boxes are distant from their monitor/keyboard, the system speaker on this motherboard is extremely weak, and there are no system speaker header pins on the motherboard. The problem goes away if I revert the system to 2.6.18-164 with no other changes. I looked through the list archives and searched the web for other people who have encountered this, but it's pretty specific (and hard to search for "system beep"!) Is there someplace can I find *detailed* release notes on the differences between -164 and -194 kernels to help in looking for the problem, pinning it down, and submitting a patch (and/or building my own kernel), or should I just download the SRPMS and dig in? Thanks, -G. -- Glenn Eychaner (geychaner at lco.cl) Telescope Systems Programmer, Las Campanas Observatory
On Wed, Aug 25, 2010 at 2:39 PM, Glenn Eychaner <geychaner at mac.com> wrote:> ? ? ? ?So, just today I noticed a problem with kernel 2.6.18-194 (CentOS 5.5) on several Intel DP965LT systems; the system beeps (such as terminal beeps) are no longer passed through to the external speakers. ?This is a problem because in our situation the boxes are distant from their monitor/keyboard, the system speaker on this motherboard is extremely weak, and there are no system speaker header pins on the motherboard. ?The problem goes away if I revert the system to 2.6.18-164 with no other changes. > ? ? ? ?I looked through the list archives and searched the web for other people who have encountered this, but it's pretty specific (and hard to search for "system beep"!)Does it have Nvidia controllers? If so, it may be related to: http://bugs.centos.org/view.php?id=4335> ?Is there someplace can I find *detailed* release notes on the differences between -164 and -194 kernels to help in looking for the problem, pinning it down, and submitting a patch (and/or building my own kernel), or should I just download the SRPMS and dig in?You can find kernel changelog diffs here (maintaind by Alan Bartlett): http://www.centos.toracat.org/ajb/kernel-clog-diff/ Akemi
Akemi Yagi amyagi at gmail.com wrote:> On Wed, Aug 25, 2010 at 2:39 PM, Glenn Eychaner <geychaner at mac.com> wrote: >> So, just today I noticed a problem with kernel 2.6.18-194 (CentOS 5.5) on several Intel DP965LT systems; the system beeps (such as terminal beeps) are no longer passed through to the external speakers. This is a problem because in our situation the boxes are distant from their monitor/keyboard, the system speaker on this motherboard is extremely weak, and there are no system speaker header pins on the motherboard. The problem goes away if I revert the system to 2.6.18-164 with no other changes. >> I looked through the list archives and searched the web for other people who have encountered this, but it's pretty specific (and hard to search for "system beep"!) > > Does it have Nvidia controllers? If so, it may be related to: > http://bugs.centos.org/view.php?id=4335Nope. It has a PCI NVidia graphics card, but the tech specs for the board (page 12) show Intel chipsets (as expected). http://downloadmirror.intel.com/15049/eng/DP965LT_TechProdSpec.pdf Besides, I tried adding the "enable_msi=0" to that line of modprobe.conf, and it didn't make any difference.>> Is there someplace can I find *detailed* release notes on the differences between -164 and -194 kernels to help in looking for the problem, pinning it down, and submitting a patch (and/or building my own kernel), or should I just download the SRPMS and dig in? > > You can find kernel changelog diffs here (maintaind by Alan Bartlett): > http://www.centos.toracat.org/ajb/kernel-clog-diff/Wow. Considering I need to look at everything from 164-15 to 194-3, that's a lot of heavy reading and searching. -G. -- Glenn Eychaner (geychaner at lco.cl) Telescope Systems Programmer, Las Campanas Observatory -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos/attachments/20100825/bd486509/attachment-0002.html>
On Aug 26, 2010, at 12:00 PM, centos-request at centos.org wrote:>> ?Is there someplace can I find *detailed* release notes on the differences between -164 and -194 kernels to help in looking for the problem, pinning it down, and submitting a patch (and/or building my own kernel), or should I just download the SRPMS and dig in? > > You can find kernel changelog diffs here (maintaind by Alan Bartlett): > > http://www.centos.toracat.org/ajb/kernel-clog-diff/Is there any place that I can find RPM or SRPM packages for the kernels between 18-164 and 18-194 that are listed in this kernel log? It would really help narrow down the problem if I could just build each kernel version and test it; then at least I'd only have one set of differences to go through rather than 30. [Not a kernel expert, but willing to give it a solid go!] Thanks, -G. -- Glenn Eychaner (geychaner at lco.cl) Telescope Systems Programmer, Las Campanas Observatory