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[dgermann]

Friends--

Amazon books, and epub books among others will not open in calibre reader. PDF books and text books will open. txt books, like my clippings also open. If I download the books that fail in the calibre reader to my kindle, the kindle is able to open them, so it seems dedrm is working.

History: In moving calibre to a new ubuntu box (20.04), I downloaded version 6.2.1 of calibre from the Website, copied all my books over from my old computer, and installed the latest DeDRM. After problems appeared I reinstalled calibre and dedrm.

Results of debug (I attempted to open a pdf book, then opened another pdf, then attempted an epub book, and maybe a kindle book):

Using calibre Qt style: True
calibre Debug log
calibre 6.2.1  embedded-python: True
Linux-5.4.0-122-generic-x86_64-with-glibc2.31 Linux ('64bit', 'ELF')
('Linux', '5.4.0-122-generic', '#138-Ubuntu SMP Wed Jun 22 15:00:31 UTC 2022')
Python 3.10.1
Interface language: None
Successfully initialized third party plugins: DeDRM (7, 2, 1)
calibre 6.2.1  embedded-python: True
Linux-5.4.0-122-generic-x86_64-with-glibc2.31 Linux ('64bit', 'ELF')
('Linux', '5.4.0-122-generic', '#138-Ubuntu SMP Wed Jun 22 15:00:31 UTC 2022')
Python 3.10.1
Interface language: None
Successfully initialized third party plugins: DeDRM (7, 2, 1)
QPA platform: xcb
devicePixelRatio: 1.2916666666666667
logicalDpi: 96.0 x 96.0
physicalDpi: 74.00862745098038 x 73.98745644599303
[0.00] Starting up...
[0.00] Showing splash screen...
[0.11] splash screen shown
[0.11] Initializing db...
[0.16] db initialized
[0.16] Constructing main UI...
[0.75] main UI initialized...
[0.75] Hiding splash screen
Starting QuickView
WebEngineContext used before QtWebEngineCore::initialize() or OpenGL context creation failed.
QGLXContext: Failed to create dummy context
Failed to initialize graphics backend for OpenGL.

(evince:364266): Gtk-WARNING **: 17:04:25.961: Could not load a pixbuf from icon theme.
This may indicate that pixbuf loaders or the mime database could not be found.
WebEngineContext used before QtWebEngineCore::initialize() or OpenGL context creation failed.
QGLXContext: Failed to create dummy context
Failed to initialize graphics backend for OpenGL.
WebEngineContext used before QtWebEngineCore::initialize() or OpenGL context creation failed.
QGLXContext: Failed to create dummy context
Failed to initialize graphics backend for OpenGL.
[52.59] splash screen hidden
[52.59] Started up in 52.59 seconds with 624 books
Worker Launch took: 0.00 seconds
Worker Launch took: 0.00 seconds
Worker Launch took: 0.00 seconds

It looks as though there might be some unsatisfied dependency there, but I don't know how to interpret it, or what to do next.

Anybody got any ideas?

Thanks!

:- Doug.

[kovidgoyal]

You are missing GPU drivers. The viewer needs to be able to use OpenGL. Either install/update/unbreak your GPU drivers or try turning off hardware rendering as described here: https://doc.qt.io/qt-6/qtwebengine-debugging.html

[dgermann]

@kovidgoyal--

Thank you for getting back to me so quickly!

This is a wonderful clue. It leads me to a new stage of being lost!

1. On the site you linked, I think what I need to use is

--disable-gpu disables GPU hardware acceleration. This is useful when diagnosing OpenGL problems.

Am I correct? If so, it seems there must be some first part to the command, or at least I have not before seen a linux command that starts with a double dash.

2. I checked in synaptic and found no openGL drivers. I did find a driver here:
https://www.nvidia.com/en-us/drivers/unix/. I am nervous to install it for fear it might break my nvidia install.

3. I have run nvida-settings and found these OpenGL Settings: should I perhaps change any of them?

Sync to VBlank (checked)
Allow Flipping (checked)
Image Settings (set to Quality--other choice are High Quality, Performance, High Performance)
Use Conformant Texture Clamping (checked)
Enable Graphics API Visual Indicator (not checked)

So you can see I am a babe in the jungle with all this. What do I test next?

Thanks, kovidgoyal!

:- Doug.

[dgermann]

@kovidgoyal

Here are some additional details which I hope are of value:

doug@wind:~$ sudo lshw -c video
  *-display                 
       description: VGA compatible controller
       product: GP106 [GeForce GTX 1060 3GB]
       vendor: NVIDIA Corporation
       physical id: 0
       bus info: pci@0000:01:00.0
       version: a1
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress vga_controller bus_master cap_list rom
       configuration: driver=nvidia latency=0
       resources: irq:39 memory:f6000000-f6ffffff memory:e0000000-efffffff memory:f0000000-f1ffffff ioport:e000(size=128) memory:c0000-dffff
  *-display
       description: VGA compatible controller
       product: Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics Controller
       vendor: Intel Corporation
       physical id: 2
       bus info: pci@0000:00:02.0
       version: 06
       width: 64 bits
       clock: 33MHz
       capabilities: msi pm vga_controller bus_master cap_list
       configuration: driver=i915 latency=0
       resources: irq:35 memory:f7400000-f77fffff memory:d0000000-dfffffff ioport:f000(size=64)
doug@wind:~$ sudo glxinfo | grep OpenGL
X Error of failed request:  BadValue (integer parameter out of range for operation)
  Major opcode of failed request:  152 (GLX)
  Minor opcode of failed request:  24 (X_GLXCreateNewContext)
  Value in failed request:  0x0
  Serial number of failed request:  110
  Current serial number in output stream:  111
doug@wind:~$ sudo nvidia-smi
Failed to initialize NVML: Driver/library version mismatch
doug@wind:~$ prime-select query
on-demand

Thanks!

:- Doug.

[kovidgoyal]

Sorry I dont use nvidia cards so cant help you with them. As for disabling hardware acceleration you set the QTWEBENGINE_CHROMIUM_FLAGS="--disable-gpu" environment variable.

[gbm]

You need to install the proprietary Nvida drivers.

https://phoenixnap.com/kb/install-nvidia-drivers-ubuntu


bernie

Originally Posted by dgermann

@kovidgoyal--

Thank you for getting back to me so quickly!

This is a wonderful clue. It leads me to a new stage of being lost!

1. On the site you linked, I think what I need to use is


Am I correct? If so, it seems there must be some first part to the command, or at least I have not before seen a linux command that starts with a double dash.

2. I checked in synaptic and found no openGL drivers. I did find a driver here:
https://www.nvidia.com/en-us/drivers/unix/. I am nervous to install it for fear it might break my nvidia install.

3. I have run nvida-settings and found these OpenGL Settings: should I perhaps change any of them?

Sync to VBlank (checked)
Allow Flipping (checked)
Image Settings (set to Quality--other choice are High Quality, Performance, High Performance)
Use Conformant Texture Clamping (checked)
Enable Graphics API Visual Indicator (not checked)

So you can see I am a babe in the jungle with all this. What do I test next?

Thanks, kovidgoyal!

:- Doug.

[dgermann]

@gbm--

Thank you. Actually I did that a week or so ago, but I am not sure if I rebooted my machine as those instructions you pointed me to say. I will try that a bit later--I am running late for an appointment at the moment.

Thanks, gbm!

:- Doug.

[dgermann]

@gbm--

Well it was what I guessed! Rebooted and I now can open these books.

Thanks for waiting for a reply, Bernie and especially for giving me the clue I needed.

Sign me...

No longer quite as clueless,
:- Doug.

[gbm]

Two things I know of that require a reboot in Linux, a new kernel and installing the proprietary Nvidia drivers

bernie

I do a complete power down on my system every night--keeps the cats off the internet........

Originally Posted by dgermann

@gbm--

Well it was what I guessed! Rebooted and I now can open these books.

Thanks for waiting for a reply, Bernie and especially for giving me the clue I needed.

Sign me...

No longer quite as clueless,
:- Doug.

[dgermann]

@gbm--



Thanks Bernie!

:- Doug.