Madhukar - Question

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Hi Allan, Benedict, JT

Greetings from Hyderabad, India.

I have been a long time viewer / listener of BSD Now and have been loving every single episode. I appreciate very much:

* The lengths to which you go to ensure that episodes are available on time.

* The effort you spend on curating and preparing the content, which I find to be very good.

* The lucid and clear explanation, in addition to a very engaging presentation of very technical subjects.

I discovered FreeBSD with 7.0-RELEASE and have been using it either on bare metal on within a VirtualBox VM ever since. I do not have any special use case, just regular Thunderbird and Firefox with a sprinkling of Personal Finance applications such as GNUCash or Ledger.

I have a 32-bit Laptop from 2006 (I guess!) that came with Windows XP. Just did not feel like throwing away a perfectly good hardware that had enough juice to satisfy my requirements. The machine graduated from Windows to Puppy Linux to FreeBSD (9.0-RELEASE to 10.2-RELEASE) to finally, OpenBSD (6.3 -> 6.4 -> 6.5). I will upgrade to the next OpenBSD release when it becomes available. However, my switch from FreeBSD 11.0-RELEASE to OpenBSD came about as the laptop would shutdown within 5 minutes due to overheating. CPU would be pegged at its highest frequency and no amount of tweaks would be any help. Besides various random blogs, I referred to the following in my attempts to search for a solution:

I was wondering if there was any document that you know of or tips to help with the CPU scaling and temperature control of current releases of FreeBSD on such old machines as this.

There were no such issues with OpenBSD so far. It works perfectly, out of the box. Along with CWM, it has been a simply fantastic experience on this hardware. Everything works, laptop runs cool for days together.

The specifications, pasting here from the OpenBSD dmesg:


OpenBSD 6.5 (GENERIC.MP) #1: Tue Jul 23 23:14:32 CEST 2019
real mem  = 2137079808 (2038MB)
avail mem = 2082770944 (1986MB)
mpath0 at root
scsibus0 at mpath0: 256 targets
mainbus0 at root
bios0 at mainbus0: date 11/30/06, BIOS32 rev. 0 @ 0xfd590, SMBIOS rev. 2.4 @ 0xdc010 (34 entries)
bios0: vendor Phoenix Technologies LTD version "Q3B91" date 11/30/2006
bios0: HCL Infosystems Limited Calistoga & ICH7M Chipset
acpi0 at bios0: rev 0
acpi0: sleep states S0 S3 S4 S5
acpi0: wakeup devices LID_(S3) HDEF(S3) PXS1(S4) PXS2(S4) PXS3(S4) USB1(S3) USB2(S3) USB3(S3) USB4(S3) LANC(S4)
acpitimer0 at acpi0: 3579545 Hz, 24 bits
acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat
cpu0 at mainbus0: apid 0 (boot processor)
cpu0: Genuine Intel(R) CPU T2250 @ 1.73GHz ("GenuineIntel" 686-class) 1.73 GHz, 06-0e-08
mtrr: Pentium Pro MTRR support, 8 var ranges, 88 fixed ranges
cpu0: apic clock running at 133MHz
cpu0: mwait min=64, max=64, C-substates=, IBE
cpu1 at mainbus0: apid 1 (application processor)


acpicpu1 at acpi0: !C3(100@57 io@0x1016), !C2(500@1 io@0x1014), C1(1000@1 halt), PSS
acpitz0 at acpi0: critical temperature is 85 degC
acpibtn0 at acpi0: PWRB


bios0: ROM list: 0xc0000/0xe600! 0xdc000/0x4000!
cpu0: Enhanced SpeedStep 1730 MHz: speeds: 1733, 1333, 1067, 800 MHz
pci0 at mainbus0 bus 0: configuration mode 1 (bios)
pchb0 at pci0 dev 0 function 0 "Intel 82945GM Host" rev 0x03
inteldrm0 at pci0 dev 2 function 0 "Intel 82945GM Video" rev 0x03
drm0 at inteldrm0
intagp0 at inteldrm0
agp0 at intagp0: aperture at 0xc0000000, size 0x10000000
inteldrm0: apic 1 int 16
inteldrm0: 1280x800, 32bpp
wsdisplay0 at inteldrm0 mux 1: console (std, vt100 emulation)
wsdisplay0: screen 1-5 added (std, vt100 emulation)
"Intel 82945GM Video" rev 0x03 at pci0 dev 2 function 1 not configured
azalia0 at pci0 dev 27 function 0 "Intel 82801GB HD Audio" rev 0x02: msi
azalia0: codecs: Conexant CX20549


In case this issue piques your interest, do let me know if you desire additional information. Once again, thank you very much for a wonderful show, I look forward to the next episode!
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