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Subjectsym53c8xx [WAS: scsi errors on CD change]
I have the same problem, but without the gnome / kde variable.  When I
try to use cdrdao to read-cd, I get these same (or very similar)
errors. I was able to read a cd just fine if I used "modprobe
sym53c8xx sym53c8xx=mpar:n" to disable parity error checking, but that
was only in 2.2.16(SMP). In 2.4.0-test5(SMP), I had no luck at all.

One potential issue w/ my situation is that I am running SMP. Is this
still an issue w/ sym53c8xx?



Sander Dol writes:
> Hi All,
> (Please CC me with reply , 'cause i am not a member of the list)
>
> I got the following situation:
>
> I installed kernel 2.4.0-test5 (and patched it later to test6 which didn't solve the problem). All works fine except the following:
>
> I started without a cd inserted in /dec/scd0.
>
> After starting the Gnome or KDE WM my system starts throwing huge amounts of the following messages to my /var/log/messages file:
>
> Aug 21 23:23:00 target kernel: sym53c875E-0-<5,0>: sync msgout: 1-3-1-c-10.
> Aug 21 23:23:00 target kernel: sym53c875E-0-<5,0>: sync msg in: 1-3-1-19-8.
> Aug 21 23:23:00 target kernel: sym53c875E-0-<5,0>: sync: per=25 scntl3=0x30 scntl4=0x0 ofs=8 fak=0 chg=0.
>
> This block is repeated constantly with exact the same content till i quit the WM.
> I also see an occasional " VFS: Disk change detected on device sr(11,0)"
>
> (Note: sym53c875E-0-<5,0> points to my Plextor (re)writer)
>
> The second situation with the same thing:
> 0. started linux 2.4.0test6
> 1. mounted iso9660 software cdrom on /dev/scd0
> 2. started KDE
> 3. things stay normal, KDE filemanager starts, no problem
> 4. umount /dev/scd0 : no problem
> 5. eject -s /dev/scd0 : Bingo, messages all over the place.
> 6. inserted a music cdrom : errors stopped. KDE cdplayer starts.
>
> So apparantly the kernel looses track of the status of my CD-RW drive.
>
> I hope anyone can help me out here.... please let me know if more info is required.
>
> Regards,
> Sander Dol
>
>
> Below my system configuration:
>
> -----------------
> SCSI peripherals:
> -----------------
>
> Attached devices:
> Host: scsi0 Channel: 00 Id: 01 Lun: 00
> Vendor: FUJITSU Model: MAB3091S SUN9.0G Rev: 1505
> Type: Direct-Access ANSI SCSI revision: 02
> Host: scsi0 Channel: 00 Id: 05 Lun: 00
> Vendor: PLEXTOR Model: CD-R PX-W4220T Rev: 1.04
> Type: CD-ROM ANSI SCSI revision: 02
> Host: scsi0 Channel: 00 Id: 06 Lun: 00
> Vendor: EXABYTE Model: EXB-8505SMBANSH2 Rev: 07T0
> Type: Sequential-Access ANSI SCSI revision: 02
> General information:
> Chip sym53c875E, device id 0xf, revision id 0x26
> On PCI bus 0, device 15, function 0, IRQ 11
> Synchronous period factor 12, max commands per lun 32
> Debug flags 0x200, verbosity level 1
>
> _______________
> Processor info:
> _______________
> processor : 0
> vendor_id : GenuineIntel
> cpu family : 6
> model : 3
> model name : Pentium II (Klamath)
> stepping : 4
> cpu MHz : 239.434238
> cache size : 512 KB
> fdiv_bug : no
> hlt_bug : no
> sep_bug : no
> f00f_bug : no
> coma_bug : no
> fpu : yes
> fpu_exception : yes
> cpuid level : 2
> wp : yes
> flags : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov mmx
> bogomips : 476.77
>
> (Motherboard: Abit LX6)
>
> ------------------
> Linux (Redhat 6.2)
> ------------------
> Linux version 2.4.0-test6 (root@target.thuis) (gcc version egcs-2.91.66 19990314/Linux (egcs-1.1.2 release)) #1 Tue Aug 22 22:34:29 CEST 2000
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