Description of problem: I have a homebrew install CD based on syslinux and since 2.6.18-1.2200.fc5 I've not been able to boot from the CD. The problem appears to be that the kernel does not detect the CD drive. Once installed I can upgrade a machine to the new kernel and boot from the hard drive but it still seems to show some problems. I have attached the diff of the dmesg from booting with the 2174 and 2239 kernels. In particular, note that the CD drive details are missing: -hdc: ATAPI 24X CD-ROM drive, 128kB Cache, UDMA(33) -Uniform CD-ROM driver Revision: 3.20 Also note the problems it now has with SATA: -ata1: SATA port has no device. scsi0 : ata_piix -ata2: SATA port has no device. +ata1: port is slow to respond, please be patient +ata1: port failed to respond (30 secs) +ata1: SRST failed (status 0xFF) +ata1: SRST failed (err_mask=0x100) +ata1: softreset failed, retrying in 5 secs +ata1: SRST failed (status 0xFF) +ata1: SRST failed (err_mask=0x100) +ata1: softreset failed, retrying in 5 secs +ata1: SRST failed (status 0xFF) +ata1: SRST failed (err_mask=0x100) +ata1: reset failed, giving up scsi1 : ata_piix +ata2: port is slow to respond, please be patient +ata2: port failed to respond (30 secs) +ata2: SRST failed (status 0xFF) +ata2: SRST failed (err_mask=0x100) +ata2: softreset failed, retrying in 5 secs +ata2: SRST failed (status 0xFF) There are no SATA drives in the machine and it used to successfully notice that and not try to do anything with them. I can provide more diagnostic information if you let me know what is required. This is seriously important to us as we are managing 1000s of machines with this system and we don't want to stick with the old 2.6.17 kernel which does not support all new hardware so I've marked it as "high" severity. Thanks, Stephen Quinney
Created attachment 141044 [details] dmesg differences
Created attachment 141045 [details] dmesg from 2.6.17-1.2174 kernel
Created attachment 141046 [details] dmesg from 2.6.18-1.2239 kernel
The problem with booting from CD seems to come down to this config change: # grep IDECD /boot/config-2.6.17-1.2187_FC5 CONFIG_BLK_DEV_IDECD=y # grep IDECD /boot/config-2.6.18-1.2200.fc5 CONFIG_BLK_DEV_IDECD=m The SATA problems are less clear though. Stephen
Known upstream problem in libata core code. Added Jeff instead.
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