Am 29.07.2013 21:27, schrieb Stefan Weil: > Am 29.07.2013 20:55, schrieb Anthony Liguori: >> Stefan Weil <s...@weilnetz.de> writes: >> >>> Am 29.07.2013 20:05, schrieb Anthony Liguori: >>>> Stefan Weil <s...@weilnetz.de> writes: >>>> >>>>> Hello, >>>>> >>>>> maybe most developers will already have noticed that the terminal output >>>>> in QEMU's GTK user interface is broken. As far as I know, it never worked, >>>>> but as there are working alternatives, I did not care much and forgot to >>>>> report the issues. >>>>> >>>>> See these snapshots which show the problems with QEMU's GTK terminals: >>>>> >>>>> http://qemu.weilnetz.de/test/bugs/qemu-gtk-demo1.png >>>>> >>>>> Here the first line of the QEMUmonitor is only partially visible. >>>>> Tested with Cygwin/X on W64 host, QEMU running on Debian Linux. >>>>> Other X servers (e.g. native X on Debian Linux) don't show this >>>>> problem. >>>> It's a GTK/Cygwin/X bug. >>>> >>>> We use a vbox without anything particularly fancy happening. Looks like >>>> something is calculating layout incorrectly. >>>> >>>> Regards, >>>> >>>> Anthony Liguori >>> I miss a comment on the more important next two points. >>> They are _not_ related to Cygwin / X. >>> >>> Do you investigate them? >> What you're seeing has always existed and is not GTK specific. There is >> not flow control on the outgoing side of serial emulation. Data will >> get dropped. >> >> My guess is that your system is sufficiently slow and overloaded that >> it's happening a lot for you. >> >> Regards, >> >> Anthony Liguori > > If it were as simply as that, that would be fine, but alas, > it isn't. Even fast servers without any load show dropped > characters. There are dropped characters for QEMU's > monitor window (Alt-ctrl-2) and for Malta's line display > (Alt-Ctrl-5). Neither of these two should suffer from missing > flow control. > > And even a current X.Org on Ubuntu shows the first bug > (crippled first line) here, so it is not Cygwin / X specific.
FWIW I've been seeing similar garbled-Gtk-output issues on openSUSE 12.3 but didn't investigate further. -monitor stdio has so far not failed me on the same system by comparison. One reproducible test case was the openrisc kernel that Jia provided recently. Regards, Andreas > > None of the Linux hosts which I use in my test is able > to display a correct Linux boot protocol on QEMU's > GTK serial console window. All of them work with SDL > or when the serial console is redirected to stdout. > > Regards, > > Stefan Weil > > -- SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg, Germany GF: Jeff Hawn, Jennifer Guild, Felix Imendörffer; HRB 16746 AG Nürnberg
