HEADS UP: Check your devices' UDMA settings - *TEMPORARY* *WORKAROUND*

[Basil Chupin]

On 06/04/2011 17:31, Goh Lip wrote:
> On 04/06/2011 01:04 PM, Basil Chupin wrote:
>> The temporary workaround for this problem is to add to the boot
>> parameters the following: libata.force=X:80c
>>
>> where X is the IDE line which is being affected by this UDMA problem. In
>> my case, the devices on line #2 are affected so I use libata.force=2:80c
>> and now the HDD and the DVDRW are being set to UDMA 100 & 100,
>> respectively.
>>
>> Using 'libata.force=X:80c' is working because libata is actually
>> statically embedded in the kernel; if it was not then you would use
>> 'force=X:80c'.
>>
>> (Now I have to go and read up on grub 2 to see how I can insert this
>> workaround in grub without having to add this everything to the boot
>> parameters at boot time.)
>
>
> Basil, I don't know anything about the UDMA issue or whether the 
> proposed solution by you will work,

Believe me, it's there alright! And the temporary workaround works.


> but to add to linux line (kernel line -grub-l speak) of the grub menu, 
> change the following at /etc/default/grub/
>
> GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
> to
> GRUB_CMDLINE_LINUX_DEFAULT="libata.force=X:80c"
>
> And then "sudo update-grub".
>
> Oh, I will be flying off in a few hours time, won't be back for a 
> week, will not be taking my thumb drive this time or using any 
> computer. (going 9,000 km away, 10 hrs flight)
>
> If you need further help, many others here can help.
>
> Regards - Goh Lip

Thanks, Goh, I'll try both your and Nils suggestions.

Have a safe and enjoyable trip and we will 'see' you in a week's time.

BC

-- 
"I believe what I am programmed to believe."
                     A robot in Futuruma