Comment #155 on issue 3543 by nsylv...@chromium.org: Checkboxes and scroll bar arrows sometimes disappear under Windows classic http://code.google.com/p/chromium/issues/detail?id=3543
@abarth: please let me know if --disable-winsta helps. in theory it should not because people started reporting this bug way before the code it changes had been introduced, but maybe it's making it worse. At this point I don't really have more experiments, I just need to start the debugger, and trace the win32 calls and find out why they can't paint, and most importantly, find out why the control panel is able to map these images back into the process. I'm pretty sure the fix is just that we need to hold onto a resource, but we just don't know which one yet. the current theory: Chrome starts the renderer in the sandbox, which needs the classic theme to be in memory. Windows knows who uses the theme and who does not, but since the renderer is in the sandbox, it fails to determine that it's using it. When the machine runs out of memory, Windows starts cleaning up stuff, including the theme bitmaps, because it thinks no one is using it. Chrome tries to reload the bitmaps, but fail because of the sandbox. When task manager is started (or firefox), it caused the memory to be mapped again. Moving the cursor on top of the items in chrome will make them repaint, this time with the right bitmap. the browser process should keep these memory regions alive, unfortunately we haven't been able to determine yet which regions we are talking about. And we are not sure either how to find that out (without having windbg attached to it and spending a couple of hours/days debugging it). -- You received this message because you are listed in the owner or CC fields of this issue, or because you starred this issue. You may adjust your issue notification preferences at: http://code.google.com/hosting/settings --~--~---------~--~----~------------~-------~--~----~ Automated mail from issue updates at http://crbug.com/ Subscription options: http://groups.google.com/group/chromium-bugs -~----------~----~----~----~------~----~------~--~---
