Disabling irq # 185

[bhamail]

For what it's worth...

While installing FC4 for x86_64 from DVD onto a dual core Athlon64 box (HP Pavilion a1250n), the install got stuck at:

Disabling irq #185

I removed both usb keyboard and usb mouse, and replaced with ps2 versions.

The install is running now.


(Previously I tried the "noprobe" option, but the install couldn't detect the SATA hard drive).

Dan

[samfraser]

I also get this, any idea why? anyways in the mean time I'll have a go at disconnecting the wireless mousea and keyboard that connect using a USB to PS2 connection.

[bhamail]

Sorry, I don't know why this happens.

Also, FYI my install succeeded with the PS/2 devices. (I had a little strangeness on this box with a usb keyboard even in knoppix (v4.4 I think) where many keystrokes were duplicated.)

Anyway, after the FC4 install finished, I ran up2date to get all the latest stuff, then shutdown, then swapped out the PS/2 gear for the USB keyboard and mouse, then rebooted, and FC4 was happy as a clam.

[samfraser]

I tried this and it worked! I'm surprised redhat haven't mentioned this problem anywhere in their installation guide, it's things like this that make ms windows so attactive to people.

Haven't got Linux fully installed yet but will follow your steps as much as possible.

All for now and thanks for the reply.

[bhamail]

Another gotcha: There's a known kernal bug with AMD64 X2 cpu that makes the system clock get wacky. The time shown will take random jumps forward. I haven't found a workaround yet. If anyone finds one, please post it here.

Dan

[samfraser]

I also had that problem, you have to modify your grub file as shown below. It also eats your cpu utilisation about 50% !! if you haven't noticed already.

Try this :-

Edit this file /root/grub/grub.conf

add this statement :- no_timer_check

to this line :- kernel /vmlinuz-2.6.11-1.1369_FC4 ro root=/dev/VolGroup00/LogVol00 rhgb quiet

so it will look like this :-

kernel /vmlinuz-2.6.11-1.1369_FC4 ro root=/dev/VolGroup00/LogVol00 rhgb quiet no_timer_check

save the file and reload the pc

[bhamail]

Thanks Sam. That seems to fix it so far. BTW, I noticed the kernel example you gave is NOT the smp (ie: dual core) kernel. Is there some reason you're not running the smp kernel on your dual core amd64 X2 ?
FWIW, I added the "no_timer_check" to my smp kernel line and so far, so good.

[samfraser]

Great I'm pleased that did it for you!

Dunno what you're on about "dual core , smp and amd64 x2", sounds good!! What's it all about? I only have a straight Athlon 64 it doesn't have a dual processor.

[bhamail]

Hi Sam,

I assumed you had a HP Pavilion a1250n (since I mentioned that at the top of the thread...).

Unfortunately, I'm finding out the fix is not totally reliable now. Maybe it's specific to the dual core cpu.
Somtimes during boot, the box hangs (with the no_timer_check param). Even worse, with the latest fc4 kernel, it also hangs w/out the no_timer_check param.

Guess I'll just use the 1644 kernel until this is fixed.

Happy Holidays.

Dan

[jtp51]

bhamail: I have the same HP a1250n model. I currently have Ubuntu 5.10 installed, however I am looking into also installing fedora core 5.

My question is, I haven't been able to control the speed on the system fan off of the Northbridge with a custom 2.6 kernel or with any other third-party daemon.

Does your system fan run at top speed under fedora core 5? If not, how did you control it?

[bhamail]

Hi Todd,

I ran out of time to play with FC4, and I'm now using Ubuntu (Breezy Badger), kernel: 2.6.12-10-amd64-k8-smp. With that kernel, My system fan is nicely quiet unless I'm really pounding the machine, and then it speeds up as I'd like it to (to avoid letting the smoke out. ;) I've never had to attempt to alter the system fan with this setup (since I've never had reason to).

I have not tried FC5 so I can't help there.

Dan

[jtp51]

Dan: Did you just download 64-bit PC (AMD64) install CD (ubuntu-5.10-install-amd64.iso) to get the kernel: 2.6.12-10-amd64-k8-smp.

Thanks,

[bhamail]

Hi Todd,

Yes, I just downloaded the iso, and installed (as I remember). The current kernel was probably upgraded since the install though.

Dan