Blank screen on previous window when opening a new one

[3N4N]

I'm using Windows 11 and Sioyek v2.0.0. When I open a new window with Ctrl-T, the the new window opens with the same file the previous window was displaying. At this point both windows work fine. But when I open a new document in either of the windows, the other one goes blank. Scrolling it changes the page numbers in the status bar at the bottom, so it seems the issue is only with displaying the document.

I found this reddit comment from a year ago that describes the same issue. But I couldn't find it reported here. That's why I'm creating this bug report.

[ahrm]

Unfortunately I don't have a windows 11 machine to test this issue, maybe someone can help?

[ahrm]

Which branch are you trying to build? If you are building the development branch note that it requires qt 6.5+. This error seems to indicate that qt was unable to open the output file, this might be a permission issue, make sure that qmake has the permission to create the files in that directory (either by moving to another drive other than c or running qmake as administrator).

[3N4N]

Sorry, the error seems to be because of "-tp vc" parameter. I took it from "build_windows.bat", but since I'm using MinGW, maybe I should be following "build_linux.sh". I did that, and qmake was able to generate the makefiles. There are some C++ errors. I'll try to fix those and let you know.

P.S. I was using the main branch and qt-5.15. Switched to dev branch now and installing qt-6.5.

[ahrm]

Yes, I think you need to specify a compiler option that allows large files, I don't remember what it is exactly for g++ but it might be -Wa,-mbig-obj (the option for visual studio is /bigobj).

[ahrm]

Hmmm I think you can comment the part between #else and #endif for now (line 8310), (it only disables some TTS-related stuff you can comment it out if you don't care about TTS).

[3N4N]

My bad. The issue was totally different. It was due to a faulty if-defined conditional in SyncTeX:

sioyek/pdf_viewer/synctex/synctex_parser_utils.h

Line 66 in 4015156

#if defined(_WIN32)

Changing it to #if defined(_WIN32) && defined __CYGWIN__ fixes the mountain of errors coming in from the standard c libraries. I will try to compile Sioyek again and let you know.

[3N4N]

Was finally able to build Sioyek. Both release and debug versions. I will try and find the cause of the bug later on.

[WvW-vOiDs]

I have the same issue. When I open a new window and switch between them using alt tab, the first window becomes blank. I'm using Windows 10 and Sioyek v2.0.0, which I downloaded from the releases.

BTW, thank you for the awesome reader. I love it so much.

[3N4N]

I couldn't reproduce the issue with the latest 'development' branch. Neither in release nor in debug mode.

@WvW-vOiDs can you check if you can reproduce the issue with this release?

Update: Sorry. The issue still exists. I'll double check.

[WvW-vOiDs]

I couldn't reproduce the issue with the latest 'development' branch. Neither in release nor in debug mode.

@WvW-vOiDs can you check if you can reproduce the issue with this release?

Update: Sorry. The issue still exists. I'll double check.

Sorry, I wasn't clear enough before. I downloaded sioyek-release-windows.zip from the release page. I didn't build it.

Thank you @3N4N for taking the time to recheck. I really appreciate it! I regret that I'm not very proficient in coding, so I can't provide any assistance.

[WvW-vOiDs]

Both issues do not show up on my Windows 11 PC.

But they still exist on Windows 10.

[3N4N]

@WvW-vOiDs I am running Windows 11 and I can still reproduce the issue. I tried to find the bug in the 'dev' branch, but still no luck. I can only say that the bug exists only in Windows, not in Linux. I'll try looking. But @ahrm, any suggestion would be really appreciated.

I found the relevant function:

sioyek/pdf_viewer/input.cpp

Lines 4246 to 4258 in 4015156

	class NewWindowCommand : public Command {
	public:
	static inline const std::string cname = "new_window";
	static inline const std::string hname = "Open a new window";
	NewWindowCommand(MainWidget* w) : Command(cname, w) {};
	void perform() {
	int new_id = widget->handle_new_window()->window_id;
	result = QString::number(new_id).toStdWString();
	}
	bool requires_document() { return false; }
	};

[ahrm]

This is the command that creates a new window. Based on your screencasts, this command seems to be working fine, as the window is created, however, no content is being rendered in that window. The rendering-related code is in pdf_view_opengl_widget.cpp. For example, you could set a breakpoint on PdfViewOpenGLWidget::my_render and see if there is a difference between the execution of the window that is rendering correctly and the other window.

[Jacinto27]

Just found this out, hard to have homework and textbooks open at the same time. I'm using windows 11

[ahrm]

Can the issue be reproduced in the experimental builds here: https://github.com/ahrm/sioyek/releases/tag/sioyek3-alpha0 ?

[Jacinto27]

works just as intended sir 🫡 cant wait for the full release sir 🫡🫡 my homework will be decimated sir 🫡🫡🫡

[Noninn1]

Can the issue be reproduced in the experimental builds here: https://github.com/ahrm/sioyek/releases/tag/sioyek3-alpha0 ?

I am having the same issue with this new version. I'm using windows 11. The new window wors fine, but the last one is blocked.

[ahrm]

Are you sure you are running the new version? ( do you have access to new commands such as add_freetext_bookmark in the commands menu)?

[Noninn1]

Heres a video: https://imgur.com/a/zOPAY4c

[ahrm]

Unfortunately I can't reproduce it on my system (I don't have a windows 11 machine, it might be a windows 11-specific issue). Can you share your prefs_user.config? Maybe there is a specific configuration that is causing the issue.

[Noninn1]

I didn't modify anything in the prefs_user.config file. I have just tried opening two windows in my laptop and it worked fine, but in my pc, the last windows crashes. This is quite strange, its something to do with my pc, but I don't know what is. (Both on windows 11, also in my laptop I can't run the sioyek 3 alpha version. I run the program but then nothing happens).