Hoi,
I started Opera via terminal and got some information from there:
$ opera
[14507:1:1002/151111.492674:ERROR:child_thread_impl.cc(806)] Receiver for unknown Channel-associated interface: search.mojom.SearchBouncer
[14509:1:1002/151111.522605:ERROR:child_thread_impl.cc(806)] Receiver for unknown Channel-associated interface: search.mojom.SearchBouncer
[14528:1:1002/151111.549248:ERROR:child_thread_impl.cc(806)] Receiver for unknown Channel-associated interface: search.mojom.SearchBouncer
[14539:1:1002/151111.576064:ERROR:child_thread_impl.cc(806)] Receiver for unknown Channel-associated interface: search.mojom.SearchBouncer
[14540:1:1002/151111.593008:ERROR:child_thread_impl.cc(806)] Receiver for unknown Channel-associated interface: search.mojom.SearchBouncer
[14565:1:1002/151111.638200:ERROR:child_thread_impl.cc(806)] Receiver for unknown Channel-associated interface: search.mojom.SearchBouncer
[14588:1:1002/151111.814029:ERROR:child_thread_impl.cc(806)] Receiver for unknown Channel-associated interface: search.mojom.SearchBouncer
[14479:14487:1002/151128.756607:ERROR:x11_software_bitmap_presenter.cc(136)] XGetWindowAttributes failed for window 58720281
Xlib: sequence lost (0x102be > 0x2c0) in reply type 0x41!
[14479:14487:1002/151137.780813:ERROR:x11_software_bitmap_presenter.cc(136)] XGetWindowAttributes failed for window 58720284
[14896:1:1002/151208.922613:ERROR:child_thread_impl.cc(806)] Receiver for unknown Channel-associated interface: search.mojom.SearchBouncer
[14909:1:1002/151209.526865:ERROR:child_thread_impl.cc(806)] Receiver for unknown Channel-associated interface: search.mojom.SearchBouncer
[14919:1:1002/151209.790920:ERROR:child_thread_impl.cc(806)] Receiver for unknown Channel-associated interface: search.mojom.SearchBouncer
[14929:1:1002/151210.002817:ERROR:child_thread_impl.cc(806)] Receiver for unknown Channel-associated interface: search.mojom.SearchBouncer
[14947:1:1002/151214.648826:ERROR:child_thread_impl.cc(806)] Receiver for unknown Channel-associated interface: search.mojom.SearchBouncer
[14479:14487:1002/151221.587034:ERROR:x11_software_bitmap_presenter.cc(136)] XGetWindowAttributes failed for window 58720297
[14479:14487:1002/151226.787002:ERROR:x11_software_bitmap_presenter.cc(136)] XGetWindowAttributes failed for window 58720303
[14479:14487:1002/151229.134732:ERROR:x11_software_bitmap_presenter.cc(136)] XGetWindowAttributes failed for window 58720306
[14981:1:1002/151236.179970:ERROR:child_thread_impl.cc(806)] Receiver for unknown Channel-associated interface: search.mojom.SearchBouncer
[14986:1:1002/151236.186421:ERROR:child_thread_impl.cc(806)] Receiver for unknown Channel-associated interface: search.mojom.SearchBouncer
[14479:14487:1002/151243.197061:ERROR:x11_software_bitmap_presenter.cc(136)] XGetWindowAttributes failed for window 58720321
[14479:14487:1002/151309.957573:ERROR:x11_software_bitmap_presenter.cc(136)] XGetWindowAttributes failed for window 58720324
[15022:1:1002/151311.215449:ERROR:child_thread_impl.cc(806)] Receiver for unknown Channel-associated interface: search.mojom.SearchBouncer
[15023:1:1002/151311.217449:ERROR:child_thread_impl.cc(806)] Receiver for unknown Channel-associated interface: search.mojom.SearchBouncer
this seems to be interesting:
[14479:14487:1002/151128.756607:ERROR:x11_software_bitmap_presenter.cc(136)] XGetWindowAttributes failed for window 58720281
and this:
Xlib: sequence lost (0x102be > 0x2c0) in reply type 0x41!
Maybe someone with more experience could look into that.