Am 29.07.2013 22:34, schrieb Andreas Färber: > 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
Maybe the problems only occur with TCG, but not with KVM. That might explain why I get them more often than Anthony :-) Up to now, I did not try GTK terminals with KVM because my typical test scenario uses MIPS or ARM boards on Intel hosts. Regards, Stefan
