2.6.20 + dell 9400 cd/dvd dma issue

[xerxesmc]

hi,
i use the latest 2.6.20 gentoo-sources on my dell inspiron 9400 laptop and am happy about the integration of a working intel hd audio driver and the new ieee80211 stack, but i cant get my ide cd/dvd-burner to work in dma mode.
i dont use the device often, but when i use it, its annoying, since its either very very slow, like 30 mins to copy 5 MB from a cd, or it is fast but makes my gentoo almost freeze for the timebeing its reading/copying from a cd.
havent tested to burn yet, since there was no need, i suppose i get disappointed too in this issue...

browsing the web i found some solutions which enabled SATA support in the SCSI driver, but this menu isnt available nin the new kernel anymore.
i hope u have some suggestions. thx in advance.

lspci

[elfarto]

I think that SATA/PATA support has been moved outside the SCSI drivers , they are now under
Device Drivers / Serial ATA (prod) and Parallel ATA (experimental) drivers, I MAY BE WRONG SINCE THIS IS FROM A 2.6.20-mm source tree, anyways, i'm not sure that the pata controller on that dell is a Intel PIIX o MPIIX.
In case you wanna give it a try you should enable the following options under the PATA/SATA drivers

ATA device support
-AHCI SATA support
-Intel PIIX/ICH SATA support

- Intel PATA MPIIX support
- Intel PATA old PIIX support (Experimental)
You should also disable everything under ATA/ATAPI/MFM/RLL support to avoid clashes between new and old drivers.
and make sure that the root device referenced in grub.conf is right.

[elfarto]

You may also want to check the following link.
http://gentoo-wiki.com/HARDWARE_Gentoo_on_Dell_Inspiron_9400

[xerxesmc]

thanks for the answer, that was it, its fast now and doesnt make my notebook freeze.
GnomeBaker doesnt recognize my device as a writer yet, but i read something about passing some arguments to the kernel during boot to fix it.
Gonna try this.

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the drive gets recognized as /dev/sr0 and not as /dev/hdc

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now i can read cds faster than before, but the burning-speed is incredible slow... normal cds 10x and dvds 1x, whereby even dmesg | grep sr0 tells me that it should be ("sr0: scsi3-mmc drive: 24x/24x writer cd/rw xa/form2 cdda tray")

[elfarto]

dunno much about gnomebaker but i know what it's a frontend for cdrecord, perhaps you should try telling cdrecord or search the option inside gnomebaker ,to "detect" the recorder again. It has been a long time since i last used a linux GUI, i do most console wizardy