From Bugzilla Helper: User-Agent: Mozilla/4.76 [en] (X11; U; Linux 2.4.1orig i686) I can't install neither fisher nor wolverine on neither an IBM netfinity 3000 nor on an IBM netvista. Reproducible: Always Steps to Reproduce: 1. Insert disc1 2. Boot 3. Hang Actual Results: Nothing :-) I even can't switch consoles. After installation via network, I can't use the CDROM drive, unless I do "hdparm -d0 /dev/hdc" So I suspect that my CDROM doesn't do DMA. How do I disable DMA for the CDROM during the installation? The BIOS offers two settings for the CDROM drive: "High performance" and "compatible"; neither works.
There will at least be an option to disable DMA; our current rawhide kernel has ide<n>=nodma available.
Can you do me a favour and past the output of cat /proc/ide/hdc/model here? With that info we can auto-set your cdromdrive as "do not use DMA"
Will this help during installation, or only after installation? Both machines (IBM Netvista 6578 and Netfinity 3000) have a drive identified as "CRD-8400B". I tried booting the wolverine CD, specifying "linux ide1=nodma", but it still hangs. Mogens
Thanks for the drive ID; it's added to the automatic "do not do DMA" list. As for ide1=nodma, the option didn't work too well and got changed to "ide=nodma" which turns of DMA for all drives... the automatic list is MUCH better...
Yes, but is this list used during _installation_?
Absolutely. It's an in-kernel list of known-bad devices for which the kernel should not attempt DMA.
I have two labs filled with 50 some computers with CRD-8400C and CRD-8480M CD-ROM drives, and the computers freeze when installing from the CD. I got around the problem by installing over the network, however, under normal usage of the computer, the machine freezes when trying to 'mount /mnt/cdrom' As mentioned in the above comments, hdparm fixes the drive. I used different options, though. My rc.local script runs 'hdparm -d1 -X34 /dev/hdc' I'm just letting you know the model numbers and my work-around so you can add them to your "do not do DMA list".
jmbastia: there is a "ide=nodma" option you could have used on the syslinux prompt. I'll add the drives to the blacklist. Thanks for reporting.
samsung cd-rom sc-140 has the same problem. I could not mount it after CD install until i did hdparm -d0 /dev/hdc. for now everything i know of works.