Red Hat Bugzilla – Bug 79670
VP_IDE (VIA vt8235) fails with FX4830T CD-ROM
Last modified: 2007-04-18 12:49:03 EDT
From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.0.0) Gecko/20020529 Description of problem: kernel-2.4.18-18.7.3 fails to drive a FX4830T ATAPI CD-ROM, even when PCI_DEVICE_ID_VIA_8235 is recompiled to VIA_UDMA_100 instead of VIA_UDMA_133. dmesg errors begin with ----- VP_IDE: VIA vt8235 (rev 00) IDE UDMA100 controller on pci00:11.1 ide0: BM-DMA at 0xfc00-0xfc07, BIOS settings: hda:DMA, hdb:pio ide1: BM-DMA at 0xfc08-0xfc0f, BIOS settings: hdc:DMA, hdd:pio hda: ST320413A, ATA DISK drive hdc: FX4830T, ATAPI CD/DVD-ROM drive hdc: ATAPI 1X DVD-ROM DVD-RAM CD-R/RW drive, 8467kB Cache hdc: status error: status=0x58 { DriveReady SeekComplete DataRequest } hdc: drive not ready for command hdc: status timeout: status=0xd1 { Busy } hdc: drive not ready for command hdc: ATAPI reset complete ----- and there are many more. The immediate symptoms are a hang for 1 to 2 minutes during boot, just after "Enabling swap space", and another hang for a couple minutes at boot during loading of keyboard layout, and another hang for a couple minutes in bringing up graphical desktop just after login. (The first inconsistency is "hdc: ATAPI 1X DVD-ROM DVD-RAM CD-R/RW drive" because it is actually a Mitsumi CD-ROM only, with moderately high speed [maximum 24X or 48X, I think].) The same hardware has no trouble booting from CD-ROM to update the system [that's how the initial upgrade to 2.4.18-17.7.3 {yes, "17": as of Nov.1, 2002} was accomplished], or booting "linux rescue" from CD-ROM (KRUD Linux 2002-11-01: RHL7.3 with all updates as of that date) to transfer new kernel-2.4.18-18.7.3.i686.rpm via scp over eth0, and then "rpm --install". The same hardware drove the CD-ROM correctly using either kernel 2.4.18-10 or 2.4.18-5 [after a recompile to enable PCI_DEVICE_ID_VIA_8235 by removing it from FUTURE_BRIDGES, and use VIA_UDMA_100.] Configuration: AMD Duron 1.2GHz, MSI KT3 Ultra2 mainboard (VIA KT333), 256MB PC2700 DDR (333MHz). RHL7.3 Workstation or Personal workstation installed. Other log and diagnostic files will be attached. ide0 has 80-wire UDMA cable, only device is harddrive as Master; ide1 has 40-wire non-UDMA cable, only device is CD-ROM as Master. Version-Release number of selected component (if applicable): 2.4.18-18.7.3 How reproducible: Always Steps to Reproduce: 1.Attempt to boot RHL7.3 with kernel 2.4.18-18.7.3. 2. 3. Actual Results: Hang for 1 to 2 minutes just after "Enabling swap space"; hang for a couple minutes loading keyboard map and/or linuxconf; hang for a couple minutes brining up graphical desktop. Harddisk filesystems and eth0 work correctly; login is possible. CD-ROM cannot be used at all. Expected Results: Normal boot, no hangs. CD-ROM works normally. Additional info:
Created attachment 88726 [details] messages from booting
Created attachment 88727 [details] /etc/sysconfig/hwconf
Created attachment 88728 [details] output from "lspci -vn"
Created attachment 88729 [details] output from "lspci -vvx"
Created attachment 88730 [details] /proc/ide/via after recompile to VIA_UDMA_100 Under original 2.4.18-18.7.x using VIA_UDMA_133, ide1 (CD-ROM) is diagnosed as having an 80-wire cable, but there are only 40 wires. ide0 (harddrive) does have an 80-wire cable.
Created attachment 88731 [details] /var/log/messages syslog
Created attachment 88732 [details] change from VIA_UDMA_133 to VIA_UDMA_100 Changing to 100MHz UDMA was just a guess based on the first error message showing apparently normal "status=0x58 { DriveReady SeekComplete DataRequest }". Anyway, the behavior at 133MHz is essentially the same.
The ISA bridge has PCI ids of 0x1106:0x3177. The hardcopy documentation for the mainboard, and dmesg, and the kernel source include/linux/pci_ids.h say that is VT8235. However, both hwconf and lspci say that is a VT8233A. Hmmm.
Created attachment 88734 [details] dmesg from good 2.4.18-3BOOT "dmesg" after BIOS boot from CD-ROM using 2.4.18-3BOOT (KRUD Linux 7.3 2002-11-01: RHL7.3 plus all patches as of that date) which reveals that the CD-ROM is 48X: ----- hdc: ATAPI 48X CD-ROM drive, 128kB Cache -----
Workaround: Vojtech Pavlik's patch works for me: http://groups.google.com/groups?hl=en&lr=&ie=UTF-8&oe=UTF-8&threadm=3DFC81C2.4020807%40tin.it&rnum=1&prev=/groups%3Fq%3DIDE-CD%2Band%2BVT8235%2Bissue!!!%26ie%3DUTF-8%26oe%3DUTF-8%26hl%3Den I considered using the via82cxxx.[ch] from linux-2.4.20-ac2 at kernel.org, but it was much more difficult to integrate into kernel-2.4.18-18.7.x, even after noticing the directory structure difference drivers/ide/pci vs drivers/ide. Voytech's patch applied to kernel-2.4.18-18.7.x with only minor fuzz, and compiled on the first attempt.
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