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[Ric Flomag <ricflomag@xxxxxxxxx>]

Public bug reported:

Binary package hint: xorg

X freezes and the screen is filled with stripes when I insert any of a
set of 4 pre-pressed cdrom of an on-line course edited by the UNDP
(United Nations Development Program).

However, I can access the cdrom from the console. Please note that *the
first file is reported to be larger than the cdrom capacity:*

$ sudo mount /dev/scd0 /cdrom
$ ls -l /media/cdrom0
total 2048052
-r-xr-xr-x 1 root root 2097152000 2000-07-22 11:19 A1Express.eqx
-r-xr-xr-x 1 root root         39 2007-02-21 18:08 autorun.inf
-r-xr-xr-x 1 root root       1888 2007-01-31 22:41 css.css
-r-xr-xr-x 1 root root       3284 2007-02-21 18:15 derechos_de_autor_cd2.htm
dr-xr-xr-x 1 root root       2048 2008-02-28 17:58 images_cd2
-r-xr-xr-x 1 root root       2320 2008-02-28 17:59 index_cd2.htm
dr-xr-xr-x 1 root root       2048 2007-09-06 22:12 javascript
-r-xr-xr-x 1 root root       3816 2007-02-21 18:06 requerimientos_cd2.htm
-r-xr-xr-x 1 root root      31744 2001-07-31 21:41 Runthis.exe
dr-xr-xr-x 1 root root       2048 2007-09-06 22:14 Unidad_4A
dr-xr-xr-x 1 root root       2048 2007-09-06 22:14 Unidad_4B

As expected, I can read any file from the cd but "A1Express.eqx":

$ cp /cdrom/A1Epress.eqx ./
-- dmesg --
[ 5153.430210] attempt to access beyond end of device
[ 5153.430225] sr0: rw=0, want=911888, limit=911884
[ 5153.430232] Buffer I/O error on device sr0, logical block 227971
[ 5153.430312] attempt to access beyond end of device
[ 5153.430317] sr0: rw=0, want=911892, limit=911884
[ 5153.430321] Buffer I/O error on device sr0, logical block 227972

I can't read read the whole device either:

$ gzip < /dev/cdrom > cdrom.iso.gz
-- dmesg --
[ 2807.501673] ISO 9660 Extensions: Microsoft Joliet Level 3
[ 2807.540452] ISOFS: changing to secondary root
[ 2990.572526] end_request: I/O error, dev sr0, sector 795904
[ 2990.572609] __ratelimit: 118 callbacks suppressed
[ 2990.572617] Buffer I/O error on device sr0, logical block 198976
[ 2990.572691] Buffer I/O error on device sr0, logical block 198977
[ 2990.572766] Buffer I/O error on device sr0, logical block 198978
[ 2990.572837] Buffer I/O error on device sr0, logical block 198979
[ 2990.572908] Buffer I/O error on device sr0, logical block 198980
[ 2990.572979] Buffer I/O error on device sr0, logical block 198981
[ 2990.573070] Buffer I/O error on device sr0, logical block 198982
[ 2990.573143] Buffer I/O error on device sr0, logical block 198983
[ 2990.573216] Buffer I/O error on device sr0, logical block 198984
[ 2990.573287] Buffer I/O error on device sr0, logical block 198985
[ 2990.580235] end_request: I/O error, dev sr0, sector 796160

Please let me know if i can provide more information.
Ric.

ProblemType: Bug
Architecture: amd64
DistroRelease: Ubuntu 9.04
NonfreeKernelModules: nvidia
Package: xorg 1:7.4~5ubuntu18
ProcEnviron:
 LANG=es_ES.UTF-8
 SHELL=/bin/bash
ProcVersion: Linux version 2.6.28-11-generic (buildd@crested) (gcc version 4.3.3 (Ubuntu 4.3.3-5ubuntu4) ) #42-Ubuntu SMP Fri Apr 17 01:58:03 UTC 2009
SourcePackage: xorg
Uname: Linux 2.6.28-11-generic x86_64

** Affects: xorg (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug

-- 
X freeze while accesing cd drive
https://bugs.launchpad.net/bugs/373896
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