Description of problem: During intallation process system seems to hang (ALL is frozen); effectively it only is a loooong time out due to DMA. How reproducible: Always Steps to Reproduce: 1. mount /mnt/cdrom Actual Results: After minutes the system returns to life Expected Results: Immediate rensponse. Additional info: System is compaq deskpro (Pentium III Katmai, 450 Mhz). Upgraded to kernel-2.4.3.12.i686 but no results. with latest kernel dmesg reports these relevant informations: hdd: set_drive_speed_status: status=0x51 { DriveReady SeekComplete Error } hdd: set_drive_speed_status: error=0xb4 hdd: ATAPI 48X CD-ROM drive, 128kB Cache, DMA Uniform CD-ROM driver Revision: 3.12 hdd: timeout waiting for DMA ide_dmaproc: chipset supported ide_dma_timeout func only: 14 scanning for RockRidge behind XA attributes ISOFS: changing to secondary root hdd: timeout waiting for DMA ide_dmaproc: chipset supported ide_dma_timeout func only: 14 If I disable DMA on that device (/sbin/hdparm -d0 /dev/hdd) the problem disappears. The drive, as identified by /proc/ide/hdd/model is an CRD-8480B (maybe LG?) Question: is this - NO DMA - the best setup or is it possible to try any option to use again DMA?
I've not seen better options than disabling the DMA on the drive. This error usually is a drive advertising DMA support but not actually supporting it; but once in a while it's a bad cable.
Thanks, I'll stick with NO DMA as I don't think it's a bad cable. Maybe add this CRD-8480B to the no-dma list ?
Yup agreed; I just added it