Bsrgvty

Some time in the last day or two, following one of the recent apt update-s the DVD driver on my desktop has stopped working.

• between: 2019-09-15 (UTC) or so


• until: 2019-09-20 (UTC)

After several unsuccessful attempts to understand what happened, I have backtracked a few steps and decided what I need to do 'work forward from here' and restore the DVD and replay operations.

Here's my thinking:

• The player should work (it can work)
  
  
  • I did work prior to what ever has changed in the software.
  
  


• By restoring function, not only will I learn something about that kind of thing, it may help others get past this kind of issue.
  
  
  • I have seen earlier problems back with Ubunty 14 and 16 that look similar on stackoverflow/askubntu.
  
  


• What ever has happened looks very largely like a regression
  
  
  • Nothing has changed in the drive or hardware itself.
  
  
  • And the 'target' DVD I chose is one that played fine 8 or 9 days ago.
  
  


• If I need to back-out a package or update, so be it. The best way to findout what it is is to identify today's problem.

Symptoms

My layman's view of the problem is that for some reason applications cannot read the DVD content. dvdbackup for example reported that ti cannot find titles. Handbrake and handbrakeCLI have similar issues. They try to read but the interpretation is unintelligible.

Same with VLC no doubt as it just ties and tries and displays a black screen -- Nothing happens. There are reports of scrambled cells and I/O errors.

You might think a DVD is corrupt. That's why I picked one I viewed successfully in the recent past.

My aim is to look at what I'd do with a new DVD drive installed.

• What steps would I follow to get a new DVD working?


• What installation errors and problems are showing up now?


• To resolve them if that's practical / feasible.
  
  
  • Back out a package or ammeliorate things with alternative or supporting packages that may be not-yet-delivered/installed.
  
  

I hope you can help. Here is the delta between a "before" and "now" scenario where I did a domestic reset and had a cup of tea.

I don't know if the dmesg people read these questions, but I'd very much prefer it if dmesg output showed the local time so I have a better idea of what is happening and where that was on the time line. Looking forward to your insights.

Delta experiment ...

What do we know?

Tonight ...

1. I took down a Harry Potter DVD that has played on this PC before (some time last week actually).
   
   
   • The result is that VLC just shuffles a bit and gives up.
   
   


2. So then unloaded the DVD


3. Ran dmesg > tmp.01
   
   
   • to get the "baseline"
   
   


4. Reloaded the DVD into the drive


5. Used the VLC "Play disk" Media menu option


6. Allowed the DVD player shuffle and grunt


7. Once that's done, ran dmesg > tmp.02 again.


8. took a delta (with diff) as shown

I apologise for pasting so much here. I am not clear on what's important and what is just a repeats of the same errors.

dmesg delta ...

[60610.254451] scsi_io_completion_action: 2 callbacks suppressed
[60610.254457] sr 1:0:0:0: [sr0] tag#4 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[60610.254460] sr 1:0:0:0: [sr0] tag#4 Sense Key : Illegal Request [current] 
[60610.254463] sr 1:0:0:0: [sr0] tag#4 Add. Sense: Read of scrambled sector without authentication
[60610.254465] sr 1:0:0:0: [sr0] tag#4 CDB: Read(10) 28 00 00 00 17 48 00 00 01 00
[60610.254467] print_req_error: 2 callbacks suppressed
[60610.254468] print_req_error: I/O error, dev sr0, sector 23840 flags 0
[60610.254473] buffer_io_error: 2 callbacks suppressed
[60610.254474] Buffer I/O error on dev sr0, logical block 5960, async page read
[60610.302074] sr 1:0:0:0: [sr0] tag#14 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[60610.302077] sr 1:0:0:0: [sr0] tag#14 Sense Key : Illegal Request [current] 
[60610.302080] sr 1:0:0:0: [sr0] tag#14 Add. Sense: Read of scrambled sector without authentication
[60610.302082] sr 1:0:0:0: [sr0] tag#14 CDB: Read(10) 28 00 00 00 17 48 00 00 01 00
[60610.302084] print_req_error: I/O error, dev sr0, sector 23840 flags 0
[60610.302087] Buffer I/O error on dev sr0, logical block 5960, async page read
[60610.338005] sr 1:0:0:0: [sr0] tag#5 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[60610.338008] sr 1:0:0:0: [sr0] tag#5 Sense Key : Illegal Request [current] 
[60610.338011] sr 1:0:0:0: [sr0] tag#5 Add. Sense: Read of scrambled sector without authentication
[60610.338014] sr 1:0:0:0: [sr0] tag#5 CDB: Read(10) 28 00 00 00 17 48 00 00 01 00
[60610.338015] print_req_error: I/O error, dev sr0, sector 23840 flags 0
[60610.338019] Buffer I/O error on dev sr0, logical block 5960, async page read
[60610.373951] sr 1:0:0:0: [sr0] tag#15 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[60610.373954] sr 1:0:0:0: [sr0] tag#15 Sense Key : Illegal Request [current] 
[60610.373957] sr 1:0:0:0: [sr0] tag#15 Add. Sense: Read of scrambled sector without authentication
[60610.373959] sr 1:0:0:0: [sr0] tag#15 CDB: Read(10) 28 00 00 00 17 48 00 00 01 00
[60610.373961] print_req_error: I/O error, dev sr0, sector 23840 flags 0
[60610.373964] Buffer I/O error on dev sr0, logical block 5960, async page read
[60610.406292] sr 1:0:0:0: [sr0] tag#16 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[60610.406295] sr 1:0:0:0: [sr0] tag#16 Sense Key : Illegal Request [current] 
[60610.406298] sr 1:0:0:0: [sr0] tag#16 Add. Sense: Read of scrambled sector without authentication
[60610.406301] sr 1:0:0:0: [sr0] tag#16 CDB: Read(10) 28 00 00 00 17 48 00 00 01 00
[60610.406302] print_req_error: I/O error, dev sr0, sector 23840 flags 0
[60610.406305] Buffer I/O error on dev sr0, logical block 5960, async page read
[60610.441955] sr 1:0:0:0: [sr0] tag#17 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[60610.441957] sr 1:0:0:0: [sr0] tag#17 Sense Key : Illegal Request [current] 
[60610.441961] sr 1:0:0:0: [sr0] tag#17 Add. Sense: Read of scrambled sector without authentication
[60610.441963] sr 1:0:0:0: [sr0] tag#17 CDB: Read(10) 28 00 00 00 17 48 00 00 01 00
[60610.441965] print_req_error: I/O error, dev sr0, sector 23840 flags 0
[60610.441968] Buffer I/O error on dev sr0, logical block 5960, async page read
[60610.473961] sr 1:0:0:0: [sr0] tag#18 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[60610.473964] sr 1:0:0:0: [sr0] tag#18 Sense Key : Illegal Request [current] 
[60610.473967] sr 1:0:0:0: [sr0] tag#18 Add. Sense: Read of scrambled sector without authentication
[60610.473969] sr 1:0:0:0: [sr0] tag#18 CDB: Read(10) 28 00 00 00 17 48 00 00 01 00
[60610.473971] print_req_error: I/O error, dev sr0, sector 23840 flags 0
[60610.473974] Buffer I/O error on dev sr0, logical block 5960, async page read
[60610.505948] sr 1:0:0:0: [sr0] tag#19 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[60610.505951] sr 1:0:0:0: [sr0] tag#19 Sense Key : Illegal Request [current] 
[60610.505954] sr 1:0:0:0: [sr0] tag#19 Add. Sense: Read of scrambled sector without authentication
[60610.505956] sr 1:0:0:0: [sr0] tag#19 CDB: Read(10) 28 00 00 00 17 48 00 00 01 00
[60610.505958] print_req_error: I/O error, dev sr0, sector 23840 flags 0
[60610.505961] Buffer I/O error on dev sr0, logical block 5960, async page read
[60610.534143] sr 1:0:0:0: [sr0] tag#20 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[60610.534146] sr 1:0:0:0: [sr0] tag#20 Sense Key : Illegal Request [current] 
[60610.534150] sr 1:0:0:0: [sr0] tag#20 Add. Sense: Read of scrambled sector without authentication
[60610.534152] sr 1:0:0:0: [sr0] tag#20 CDB: Read(10) 28 00 00 00 17 48 00 00 01 00
[60610.534154] print_req_error: I/O error, dev sr0, sector 23840 flags 0
[60610.534157] Buffer I/O error on dev sr0, logical block 5960, async page read
[60610.682399] sr 1:0:0:0: [sr0] tag#21 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[60610.682403] sr 1:0:0:0: [sr0] tag#21 Sense Key : Illegal Request [current] 
[60610.682406] sr 1:0:0:0: [sr0] tag#21 Add. Sense: Read of scrambled sector without authentication
[60610.682409] sr 1:0:0:0: [sr0] tag#21 CDB: Read(10) 28 00 00 00 fa 35 00 00 01 00
[60610.682411] print_req_error: I/O error, dev sr0, sector 256212 flags 0
[60610.682416] Buffer I/O error on dev sr0, logical block 64053, async page read
[60622.600135] scsi_io_completion_action: 2 callbacks suppressed
[60622.600142] sr 1:0:0:0: [sr0] tag#9 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[60622.600146] sr 1:0:0:0: [sr0] tag#9 Sense Key : Illegal Request [current] 
[60622.600149] sr 1:0:0:0: [sr0] tag#9 Add. Sense: Read of scrambled sector without authentication
[60622.600152] sr 1:0:0:0: [sr0] tag#9 CDB: Read(10) 28 00 00 00 17 48 00 00 01 00
[60622.600154] print_req_error: 2 callbacks suppressed
[60622.600156] print_req_error: I/O error, dev sr0, sector 23840 flags 0
[60622.600161] buffer_io_error: 2 callbacks suppressed
[60622.600162] Buffer I/O error on dev sr0, logical block 5960, async page read
[60622.632139] sr 1:0:0:0: [sr0] tag#21 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[60622.632142] sr 1:0:0:0: [sr0] tag#21 Sense Key : Illegal Request [current] 
[60622.632145] sr 1:0:0:0: [sr0] tag#21 Add. Sense: Read of scrambled sector without authentication
[60622.632147] sr 1:0:0:0: [sr0] tag#21 CDB: Read(10) 28 00 00 00 17 48 00 00 01 00
[60622.632149] print_req_error: I/O error, dev sr0, sector 23840 flags 0
[60622.632152] Buffer I/O error on dev sr0, logical block 5960, async page read
[60622.664010] sr 1:0:0:0: [sr0] tag#23 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[60622.664013] sr 1:0:0:0: [sr0] tag#23 Sense Key : Illegal Request [current] 
[60622.664017] sr 1:0:0:0: [sr0] tag#23 Add. Sense: Read of scrambled sector without authentication
[60622.664019] sr 1:0:0:0: [sr0] tag#23 CDB: Read(10) 28 00 00 00 17 48 00 00 01 00
[60622.664021] print_req_error: I/O error, dev sr0, sector 23840 flags 0
[60622.664026] Buffer I/O error on dev sr0, logical block 5960, async page read
[60622.696149] sr 1:0:0:0: [sr0] tag#31 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[60622.696152] sr 1:0:0:0: [sr0] tag#31 Sense Key : Illegal Request [current] 
[60622.696156] sr 1:0:0:0: [sr0] tag#31 Add. Sense: Read of scrambled sector without authentication
[60622.696158] sr 1:0:0:0: [sr0] tag#31 CDB: Read(10) 28 00 00 00 17 48 00 00 01 00
[60622.696159] print_req_error: I/O error, dev sr0, sector 23840 flags 0
[60622.696163] Buffer I/O error on dev sr0, logical block 5960, async page read
[60622.728011] sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[60622.728014] sr 1:0:0:0: [sr0] tag#0 Sense Key : Illegal Request [current] 
[60622.728017] sr 1:0:0:0: [sr0] tag#0 Add. Sense: Read of scrambled sector without authentication
[60622.728020] sr 1:0:0:0: [sr0] tag#0 CDB: Read(10) 28 00 00 00 17 48 00 00 01 00
[60622.728021] print_req_error: I/O error, dev sr0, sector 23840 flags 0
[60622.728025] Buffer I/O error on dev sr0, logical block 5960, async page read
[60622.768156] sr 1:0:0:0: [sr0] tag#1 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[60622.768159] sr 1:0:0:0: [sr0] tag#1 Sense Key : Illegal Request [current] 
[60622.768162] sr 1:0:0:0: [sr0] tag#1 Add. Sense: Read of scrambled sector without authentication
[60622.768165] sr 1:0:0:0: [sr0] tag#1 CDB: Read(10) 28 00 00 00 17 48 00 00 01 00
[60622.768166] print_req_error: I/O error, dev sr0, sector 23840 flags 0
[60622.768170] Buffer I/O error on dev sr0, logical block 5960, async page read
[60622.800184] sr 1:0:0:0: [sr0] tag#2 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[60622.800187] sr 1:0:0:0: [sr0] tag#2 Sense Key : Illegal Request [current] 
[60622.800190] sr 1:0:0:0: [sr0] tag#2 Add. Sense: Read of scrambled sector without authentication
[60622.800192] sr 1:0:0:0: [sr0] tag#2 CDB: Read(10) 28 00 00 00 17 48 00 00 01 00
[60622.800194] print_req_error: I/O error, dev sr0, sector 23840 flags 0
[60622.800198] Buffer I/O error on dev sr0, logical block 5960, async page read
[60622.832250] sr 1:0:0:0: [sr0] tag#3 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[60622.832253] sr 1:0:0:0: [sr0] tag#3 Sense Key : Illegal Request [current] 
[60622.832256] sr 1:0:0:0: [sr0] tag#3 Add. Sense: Read of scrambled sector without authentication
[60622.832258] sr 1:0:0:0: [sr0] tag#3 CDB: Read(10) 28 00 00 00 17 48 00 00 01 00
[60622.832260] print_req_error: I/O error, dev sr0, sector 23840 flags 0
[60622.832264] Buffer I/O error on dev sr0, logical block 5960, async page read
[60622.860376] sr 1:0:0:0: [sr0] tag#4 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[60622.860379] sr 1:0:0:0: [sr0] tag#4 Sense Key : Illegal Request [current] 
[60622.860383] sr 1:0:0:0: [sr0] tag#4 Add. Sense: Read of scrambled sector without authentication
[60622.860385] sr 1:0:0:0: [sr0] tag#4 CDB: Read(10) 28 00 00 00 17 48 00 00 01 00
[60622.860386] print_req_error: I/O error, dev sr0, sector 23840 flags 0
[60622.860390] Buffer I/O error on dev sr0, logical block 5960, async page read
[60623.004249] sr 1:0:0:0: [sr0] tag#5 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[60623.004252] sr 1:0:0:0: [sr0] tag#5 Sense Key : Illegal Request [current] 
[60623.004256] sr 1:0:0:0: [sr0] tag#5 Add. Sense: Read of scrambled sector without authentication
[60623.004258] sr 1:0:0:0: [sr0] tag#5 CDB: Read(10) 28 00 00 00 fa 35 00 00 01 00
[60623.004260] print_req_error: I/O error, dev sr0, sector 256212 flags 0
[60623.004265] Buffer I/O error on dev sr0, logical block 64053, async page read

I believe I have found the fix for this problem. Something in last week's update removed or some how hid some or all of the libdvdcss package. The only other activity on the PC last week was some spreadsheets and file editing. So for now I'm sticking with the regular update theory.

Fix-it-up:

In order to be sure everything is installed I removed the key players and reinstalled everything using the VLC libdvdcss build:

sudo apt remove libdvd-pkg handbrake-cli vlc handbrake
sudo apt install libdvd-pkg handbrake-cli vlc handbrake
sudo dpkg-reconfigure libdvd-pkg

Now my dmesg log is nice and clean again.

I am happy. I would be curiour however if you know how the libdvdcss might have been removed (or crippled) by a package upgrade. It seems very odd for that to have happened (if indeed that's the vector).