Bug 754306 – All out-of-process applets crash with transparent background

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Bug 754306 - All out-of-process applets crash with transparent background


Summary:	All out-of-process applets crash with transparent background


Status:	RESOLVED FIXED

Product:	gnome-panel
Classification:	Other
Component:	panel
Version:	git master
Hardware:	Other Linux

Importance:	Normal critical
Target Milestone:	---
Assigned To:	Panel Maintainers
QA Contact:	Panel Maintainers

URL:
Whiteboard:

Depends on:
Blocks:

Reported:	2015-08-30 01:02 UTC by Balló György
Modified:	2015-09-10 08:11 UTC

See Also:
GNOME target:	---
GNOME version:	---

Attachments
libpanel-applet: use rgba visual if it is available (1.87 KB, patch) 2015-09-05 15:19 UTC, Alberts Muktupāvels	committed	Details \| Review

Description Balló György 2015-08-30 01:02:02 UTC

Steps to reproduce:

1. Set panel background to a color with opacity, or to an image.

2. Add a new out-of-process applet to the panel (e.g. Eyes applet). The applet's process crashes every time when you try to do that.

Process output:

(geyes_applet2:7043): Gdk-ERROR **: The program 'geyes_applet2' received an X Window System error.
This probably reflects a bug in the program.
The error was 'BadMatch (invalid parameter attributes)'.
  (Details: serial 273 error_code 8 request_code 62 (core protocol) minor_code 0)
  (Note to programmers: normally, X errors are reported asynchronously;
   that is, you will receive the error a while after causing it.
   To debug your program, run it with the GDK_SYNCHRONIZE environment
   variable to change this behavior. You can then get a meaningful
   backtrace from your debugger if you break on the gdk_x_error() function.)
Trace/breakpoint trap (core dumped)

Tested with the current git master versions of gnome-panel and gnome-applets.

Comment 1 Sebastian 2015-08-30 09:12:46 UTC

Hi Ballo,

I cannot reproduce your issue. I am running a jhbuild session with the latest (from a few days ago) gnome-panel and have a transparent background, when I add Xeyes or any other out-process applet the applet is added as expected and nothing crashes.

Can you provide more information?

Comment 2 Balló György 2015-08-30 11:18:30 UTC

I have glib2 2.44.1 and gtk3 3.16.6 on my system.

Here is the backtrace:

+ Trace 235402

#0 g_logv
from /usr/lib/libglib-2.0.so.0
#1 g_log
from /usr/lib/libglib-2.0.so.0
#2 ??
from /usr/lib/libgdk-3.so.0
#3 ??
from /usr/lib/libgdk-3.so.0
#4 _XError
from /usr/lib/libX11.so.6
#5 ??
from /usr/lib/libX11.so.6
#6 ??
from /usr/lib/libX11.so.6
#7 _XEventsQueued
from /usr/lib/libX11.so.6
#8 XPending
from /usr/lib/libX11.so.6
#9 ??
from /usr/lib/libgdk-3.so.0
#10 gdk_display_get_event
from /usr/lib/libgdk-3.so.0
#11 ??
from /usr/lib/libgdk-3.so.0
#12 g_main_context_dispatch
from /usr/lib/libglib-2.0.so.0
#13 ??
from /usr/lib/libglib-2.0.so.0
#14 g_main_loop_run
from /usr/lib/libglib-2.0.so.0
#15 gtk_main
from /usr/lib/libgtk-3.so.0
#16 _panel_applet_factory_main_internal
at panel-applet.c line 2318
#17 ??
#18 __libc_start_main
from /usr/lib/libc.so.6
#19 ??

Comment 3 Alberts Muktupāvels 2015-08-30 11:28:41 UTC

When reload applet dialog opens do this:
1) gdb /path/to/geyes_applet2
2) set env GDK_SYNCHRONIZE = 1
3) run

Then click 'Reload' button. It might give better info...

Comment 4 Balló György 2015-08-30 11:36:46 UTC

Backtrace with 'GDK_SYNCHRONIZE = 1':

+ Trace 235403

#0 g_logv
from /usr/lib/libglib-2.0.so.0
#1 g_log
from /usr/lib/libglib-2.0.so.0
#2 ??
from /usr/lib/libgdk-3.so.0
#3 ??
from /usr/lib/libgdk-3.so.0
#4 _XError
from /usr/lib/libX11.so.6
#5 ??
from /usr/lib/libX11.so.6
#6 ??
from /usr/lib/libX11.so.6
#7 _XReply
from /usr/lib/libX11.so.6
#8 XSync
from /usr/lib/libX11.so.6
#9 ??
from /usr/lib/libX11.so.6
#10 XCopyArea
from /usr/lib/libX11.so.6
#11 ??
from /usr/lib/libcairo.so.2
#12 ??
from /usr/lib/libcairo.so.2
#13 ??
from /usr/lib/libcairo.so.2
#14 ??
from /usr/lib/libcairo.so.2
#15 ??
from /usr/lib/libcairo.so.2
#16 ??
from /usr/lib/libcairo.so.2
#17 ??
from /usr/lib/libcairo.so.2
#18 cairo_paint
from /usr/lib/libcairo.so.2
#19 gdk_window_end_paint
from /usr/lib/libgdk-3.so.0
#20 gtk_main_do_event
from /usr/lib/libgtk-3.so.0
#21 ??
from /usr/lib/libgdk-3.so.0
#22 ??
from /usr/lib/libgdk-3.so.0
#23 ??
from /usr/lib/libgdk-3.so.0
#24 ??
from /usr/lib/libgobject-2.0.so.0
#25 g_signal_emit_valist
from /usr/lib/libgobject-2.0.so.0
#26 g_signal_emit_by_name
from /usr/lib/libgobject-2.0.so.0
#27 ??
from /usr/lib/libgdk-3.so.0
#28 ??
from /usr/lib/libgdk-3.so.0
#29 ??
from /usr/lib/libglib-2.0.so.0
#30 g_main_context_dispatch
from /usr/lib/libglib-2.0.so.0
#31 ??
from /usr/lib/libglib-2.0.so.0
#32 g_main_loop_run
from /usr/lib/libglib-2.0.so.0
#33 gtk_main
from /usr/lib/libgtk-3.so.0
#34 _panel_applet_factory_main_internal
at panel-applet.c line 2318
#35 ??
#36 __libc_start_main
from /usr/lib/libc.so.6
#37 ??

Comment 5 Alberts Muktupāvels 2015-09-05 15:19:35 UTC

Created attachment 310702 [details] [review]
libpanel-applet: use rgba visual if it is available

Comment 6 Alberts Muktupāvels 2015-09-05 15:20:12 UTC

Can you test if this patch fix this bug?

Comment 7 Balló György 2015-09-10 00:41:27 UTC

I tested the patch, and it fixes the problem. Thank you very much!