[Bug 192993] New: CDROM on amd danube laptop does not work in 10 (9.2 works)

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=192993

            Bug ID: 192993
           Summary: CDROM on amd danube laptop does not work in 10 (9.2
                    works)
           Product: Base System
           Version: 10.0-STABLE
          Hardware: amd64
                OS: Any
            Status: Needs Triage
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: Mathias.Picker at virtual-earth.de

Switching to 10-stable my cdrom no longer works. The Laptop is an Acer 5553g.

I tried with a 9.2 live enviroment, it's still working fine, ruling out a
hardware problem.

in 10-stable I get this error continously:

ahcich1: Timeout on slot 0 port 0
ahcich1: is 00000002 cs 00000000 ss 00000000 rs 00000001 tfd 50 serr 00000000
cmd 00006017
(aprobe0:ahcich1:0:0:0): ATAPI_IDENTIFY. ACB: a1 00 00 00 00 40 00 00 00 00 00
00
(aprobe0:ahcich1:0:0:0): CAM status: Command timeout
(aprobe0:ahcich1:0:0:0): Error 5, Retries exhausted

in 9.2 I get this:

cd0 at ahcich1 bus 0 scbus1 target 0 lun 0
cd0: <HL-DT-ST DVDRAM GT31N 1.00> Removable CD-ROM SCSI-0 device 
cd0: 150.000MB/s transfers (SATA 1.x, UDMA5, ATAPI 12bytes, PIO 8192bytes)
cd0: Attempt to query device size failed: NOT READY, Medium not present - tray
closed

and camcontrol shows the drive as:

pass1: <HL-DT-STDVDRAM GT31N 1.00> ATAPI-7 SATA 1.x device
pass1: 150.000MB/s transfers (SATA 1.x, UDMA5, ATAPI 12bytes, PIO 8192bytes)

protocol              ATA/ATAPI-7 SATA 1.x
device model          HL-DT-STDVDRAM GT31N
firmware revision     1.00
serial number         KY2A3G91934
cylinders             0
heads                 0
sectors/track         0
sector size           logical 512, physical 512, offset 0
LBA supported         
LBA48 not supported       
PIO supported         PIO4
DMA supported         WDMA2 UDMA5 

Feature                      Support  Enabled   Value           Vendor
read ahead                     no    no
write cache                    no    no
flush cache                    no    no
overlap                        no
Tagged Command Queuing (TCQ)   no    no
Native Command Queuing (NCQ)   no
SMART                          no    no
microcode download             no    no
security                       no    no
power management               no    no
advanced power management      no    no
automatic acoustic management  no    no
media status notification      no    no
power-up in Standby            no    no
write-read-verify              no    no
unload                         no    no
free-fall                      no    no
Data Set Management (DSM/TRIM) no
Host Protected Area (HPA)      no


I don't really need the cd, but this slows boot quite a lot and fills my log
file with useless info, so I workaround would be great!

Thanks, Mathias

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