I'm starting to believe that it has something to do with some option in the kernel that is not enabled. I just swap the CD/RW Plextor from the machine that is working OK on kernel 2.6.11 (where DMA is enabled and everything is working, CD/RW, except eject - but that is another story) into a new New Machine on kernel-2.6.12
Anyhow, I just put the Plextor CD/RW into my new machine and the DMA was not not enabled: hdparm /dev/hdc for plextor on working machine. /dev/hdc: IO_support = 1 (32-bit) unmaskirq = 1 (on) using_dma = 1 (on) keepsettings = 0 (off) readonly = 0 (off) readahead = 256 (on) hdparm for plextor on new machine: /dev/hdd: IO_support = 0 (16-bit) unmaskirq = 0 (off) using_dma = 0 (off) keepsettings = 0 (off) readonly = 0 (off) readahead = 256 (on) So, I strongly believe it has to do with some setting in the kernel or diver. Another interesting thing is that lshw is not even listing CDROM present in a new machine for both drives: BenQ and Plextor, even though kernel detects them correctly. I did not put BenQ Writer into working machine, I'll try to analyze both kernel settings first, to see what I'm missing. -- #Joseph > > This makes it more likely that the problem is lack of support for your > > IDE chipset in your kernel. > > Joseph, > > Please post *ALL* of the output of a dmesg and lspci-v command. > I too believe chipset issues are most likely the problem. > > I am at present fighting a similar problem with a 915GM. > > -- > Regards, > Ray > > > -- gentoo-user@gentoo.org mailing list
