<div dir="ltr"><font face="georgia,serif">Hi,<br><br>I have a new computer with CentOS 6. I happened to start a rather long task that I think is memory-, but not CPU-, intensive. Just for the fun of it I started top, and was very surprised to see that the first two lines were always<br>
<br style="font-family:courier new,monospace"><span style="font-family:courier new,monospace"> PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND </span><br style="font-family:courier new,monospace">
<span style="font-family:courier new,monospace"> 38 root 20 0 0 0 0 R 66.2 0.0 2671:58 kacpid </span><br style="font-family:courier new,monospace">
<span style="font-family:courier new,monospace"> 39 root 20 0 0 0 0 S 32.6 0.0 1320:31 kacpi_notify </span><br style="font-family:courier new,monospace" clear="all">
</font><br clear="all"><span style="font-family:georgia,serif">It looks a lot like various issues with laptops from way back, e.g., <a href="https://bugzilla.redhat.com/show_bug.cgi?id=451896">https://bugzilla.redhat.com/show_bug.cgi?id=451896</a>, <a href="https://bugzilla.redhat.com/show_bug.cgi?id=454954">https://bugzilla.redhat.com/show_bug.cgi?id=454954</a>, etc. This one is a regular PC working as a server in a cool server room, just arrived about a week ago. 2CPUs, 4G of RAM, 2 HDs in software RAID1, nothing special. Kernel 2.6.32-220.23.1.el6.x86_64 (RedHat).</span><br style="font-family:georgia,serif">
<br style="font-family:georgia,serif"><span style="font-family:georgia,serif">I understand it may be a BIOS issue with ACPI implementation, or it may be a kernel bug (though I'd expect those to be sorted out by now, given that the general issue is old). I have not yet tinkered with the BIOS or the kernel (may do it on Sunday when customers sleep), but I am vaguely concerned that if I manage to switch ACPI off in the BIOS I may miss real overheating (of which this may be a symptom - ?).</span><br style="font-family:georgia,serif">
<br><span style="font-family:georgia,serif">dmesg contains stuff like</span><br><br><span style="font-family:courier new,monospace">ata1: SATA link up 6.0 Gbps (SStatus 133 SControl 300)</span><br style="font-family:courier new,monospace">
<span style="font-family:courier new,monospace">ata1.00: ACPI _SDD failed (AE 0x5)</span><br style="font-family:courier new,monospace"><span style="font-family:courier new,monospace">ata3: SATA link up 1.5 Gbps (SStatus 113 SControl 300)</span><br style="font-family:courier new,monospace">
<span style="font-family:courier new,monospace">ata2: SATA link up 3.0 Gbps (SStatus 123 SControl 300)</span><br style="font-family:courier new,monospace"><span style="font-family:courier new,monospace">ata3.00: ACPI _SDD failed (AE 0x5)</span><br style="font-family:courier new,monospace">
<span style="font-family:courier new,monospace">ata2.00: ACPI _SDD failed (AE 0x5)</span><br style="font-family:courier new,monospace"><span style="font-family:courier new,monospace">ata1: SATA link up 6.0 Gbps (SStatus 133 SControl 300)</span><br style="font-family:courier new,monospace">
<span style="font-family:courier new,monospace">ata1.00: ACPI _SDD failed (AE 0x5)</span><br style="font-family:courier new,monospace"><span style="font-family:courier new,monospace">ata1.00: ACPI: failed the second time, disabled</span><br style="font-family:courier new,monospace">
<span style="font-family:courier new,monospace">ata1.00: ATA-8: ST500DM002-1BD142, HP73, max UDMA/100</span><br style="font-family:courier new,monospace"><span style="font-family:courier new,monospace">ata1.00: 976773168 sectors, multi 16: LBA48 NCQ (depth 31/32)</span><br style="font-family:courier new,monospace">
<span style="font-family:courier new,monospace">ata1.00: configured for UDMA/100</span><br style="font-family:courier new,monospace"><span style="font-family:courier new,monospace">scsi 0:0:0:0: Direct-Access ATA ST500DM002-1BD14 HP73 PQ: 0 ANSI: 5</span><br style="font-family:courier new,monospace">
<span style="font-family:courier new,monospace">ata3: SATA link up 1.5 Gbps (SStatus 113 SControl 300)</span><br style="font-family:courier new,monospace"><span style="font-family:courier new,monospace">ata2: SATA link up 3.0 Gbps (SStatus 123 SControl 300)</span><br style="font-family:courier new,monospace">
<span style="font-family:courier new,monospace">ata3.00: ACPI _SDD failed (AE 0x5)</span><br style="font-family:courier new,monospace"><span style="font-family:courier new,monospace">ata3.00: ACPI: failed the second time, disabled</span><br>
<br style="font-family:georgia,serif"><span style="font-family:georgia,serif">/var/log/messages has similar messages plus basic information stuff that does not tell me much. Any advice from more experienced admins than me?</span><br style="font-family:georgia,serif">
<span style="font-family:georgia,serif"> </span><br>-- <br>Oleg Goldshmidt | <a href="mailto:oleg@goldshmidt.org" target="_blank">oleg@goldshmidt.org</a><br>
</div>