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Bug 561548 - sys-kernel/linux-4.2: KVM changes breaks boot and app-emulation/qemu-2.4.0 fails to initialize guest
Summary: sys-kernel/linux-4.2: KVM changes breaks boot and app-emulation/qemu-2.4.0 fa...
Status: RESOLVED OBSOLETE
Alias: None
Product: Gentoo Linux
Classification: Unclassified
Component: Current packages (show other bugs)
Hardware: AMD64 Linux
: Normal normal (vote)
Assignee: Gentoo Kernel Bug Wranglers and Kernel Maintainers
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2015-09-26 09:06 UTC by Sorin Panca
Modified: 2015-11-30 14:16 UTC (History)
5 users (show)

See Also:
Package list:
Runtime testing required: ---


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Description Sorin Panca 2015-09-26 09:06:17 UTC
When starting a guest in app-emulation/qemu-2.4.0-r1 the application console freezes with the "Guest has not initialized the display (yet)." message.

Reproducible: Always

Steps to Reproduce:
1. Test a amd64 KVM using an iso and confirm it works with <app-emulation/qemu-2.4.0.
2. Update to app-emulation/qemu-2.4.0-r1.
3. Test the same amd64 KVM with the new qemu.
Actual Results:  
Using app-emulation/qemu-2.4.0-r1 the qemu console window shows the "Guest has not initialized the display (yet)." message, both when using sdl or sdl2, or with -vga std, or -vga qxl, both with sys-firmware/seabios-1.7.5-r1 or sys-firmware/seabios-1.8.2. Not tested with <sys-kernel/gentoo-sources-4.2.0.


# emerge --info
Portage 2.2.22 (python 3.4.3-final-0, default/linux/amd64/13.0, gcc-4.9.3, glibc-2.20-r2, 4.2.1-gentoo x86_64)
=================================================================
System uname: Linux-4.2.1-gentoo-x86_64-Intel-R-_Core-TM-_i7_CPU_870_@_2.93GHz-with-gentoo-2.2
KiB Mem:    12239112 total,   8612704 free
KiB Swap:    1004024 total,   1004024 free
sh bash 4.3_p42
ld GNU ld (Gentoo 2.25.1 p1.1) 2.25.1
distcc 3.2rc1 x86_64-pc-linux-gnu [disabled]
app-shells/bash:          4.3_p42::gentoo
dev-java/java-config:     2.2.0::gentoo
dev-lang/perl:            5.22.0::gentoo
dev-lang/python:          2.7.10::gentoo, 3.4.3::gentoo
dev-util/cmake:           3.3.2::gentoo
dev-util/pkgconfig:       0.28-r3::gentoo
sys-apps/baselayout:      2.2::gentoo
sys-apps/openrc:          0.17::gentoo
sys-apps/sandbox:         2.8::gentoo
sys-devel/autoconf:       2.13::gentoo, 2.69-r1::gentoo
sys-devel/automake:       1.11.6-r1::gentoo, 1.12.6::gentoo, 1.13.4::gentoo, 1.14.1::gentoo, 1.15::gentoo
sys-devel/binutils:       2.25.1-r1::gentoo
sys-devel/gcc:            4.9.3::gentoo
sys-devel/gcc-config:     1.8::gentoo
sys-devel/libtool:        2.4.6-r1::gentoo
sys-devel/make:           4.1-r1::gentoo
sys-kernel/linux-headers: 4.2::gentoo (virtual/os-headers)
sys-libs/glibc:           2.20-r2::gentoo
Repositories:

gentoo
    location: /var/lib/portage/repos/gentoo
    sync-type: git
    sync-uri: http://anongit.gentoo.org/git/repo/gentoo.git
    priority: 9

ACCEPT_KEYWORDS="amd64 ~amd64"
ACCEPT_LICENSE="*"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-O2 -pipe -fomit-frame-pointer -mtune=corei7"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/share/config /usr/share/gnupg/qualified.txt /usr/share/themes/oxygen-gtk/gtk-2.0 /var/bind"
CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/dconf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo"
CXXFLAGS="-O2 -pipe -fomit-frame-pointer -mtune=corei7"
DISTDIR="/var/pub/mirror/src"
FCFLAGS="-O2 -pipe"
FEATURES="assume-digests binpkg-logs config-protect-if-modified distlocks ebuild-locks fixlafiles merge-sync news parallel-fetch preserve-libs protect-owned sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync"
FFLAGS="-O2 -pipe"
GENTOO_MIRRORS="http://mirrors.xservers.ro/gentoo/ ftp://de-mirror.org/distro/gentoo/ ftp://ftp.wh2.tu-dresden.de/pub/mirrors/gentoo"
LANG="en_US.utf-8"
LC_ALL="en_US.utf-8"
LDFLAGS="-Wl,-O1 -Wl,--as-needed"
MAKEOPTS="-j9"
PKGDIR="/var/pub/mirror/pkg/gentoo"
PORTAGE_CONFIGROOT="/"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --omit-dir-times --compress --force --whole-file --delete --stats --human-readable --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages"
PORTAGE_TMPDIR="/var/tmp/portage"
USE="10bit 600-llvm-compiler X X509 a52 aac aacplus aalib acl acm acpi action_modeswitch admin aio alsa amd64 amr amrenc animation-rtl ao ap api apm apng archive attrib audio audiofile auto-hinter autoipd avahi bash-completion berkdb bluetooth bluray boost branding bs2b bzip2 cairo caps cec celt cgi cgmanager clang cleartype cli client colord consolekit contrast corefonts cpudetection cpuload cracklib crossdev crypt cups curl custom-cflags custom-optimization cxx d3d9 dbus dga dhcp dirac djvu dlz dmx dom dri drm drmkms dts dv dvb dvd eap-sim edd egl eglfs encode equalizer evdev exif extensible extras faac fam fbcon fdk fdt ffmpeg fftw fits flac flask fontconfig fontforge fortran fpx g3dvl gbm gcrypt gd gdbm geoip ggi gif gimp glamor glib glibc-omitfp glitz gmp gnome gnome-keyring gnutls gpm gsm gstreamer gtk gtk-style gtk3 gudev harfbuzz hdri health hpn html http httpd hvm hwdb icons iconv icu id3tag idn imagemagick imlib introspection ioemu irrlicht iso jack jbig jp2k jpeg jpeg2k json kdrive keymap kms kvm ladspa lame largepages lcms legacy-systray libass libatomic libdrm libkms libnotify libsamplerate libssh2 libv4l lightdm live llvm-shared-libs lm_sensors logrotate lqr lto lua luajit lximage lz4 lzma lzo mad maemo6 matroska mdnsresponder-compat messages metalink minizip mktemp mmap mms mmx mmxext mng modplug modules mount mozilla mp3 mp3rtp mpeg mpx mtp multilib multitarget musepack ncurses netboot netlink network networkmonitor nls nptl ogg omxil openal openexr opengl openmax openmp openssl opus orbit osmesa pam pango pcap pcre pcre16 pdf perl pgo physics pic pipelight pixman pmu pnat png policykit postproc postscript powermanagement pulseaudio pvr pygrub python python3 q32 q64 q8 qemu qt5 quicktime quvi r600-llvm-compiler radosgw raw rdp readline realtime romio rtmp rtsp scanner schroedinger scim screen sdl sdl-image sdl2 seccomp sendmail sensord session sftp shared-dricore shout skins smp smux sndfile sound speex spice sqlite sse sse2 sse2_4way sse3 sse4 sse4_1 sse4_2 ssh ssl ssse3 staging svg symlink sysstat systemd taglib tci tcmalloc tcpd tga theora threads tiff timezone tinyxml tls tools tpoxy truetype tslib twolame type3 udev udisks undi unicode upnp upower urandom usb usbredir uuid uvm v4l v4l2 vaapi vcd vcdx vde vdpau vdr vhost-net video vim-syntax virtfs vlm vnc voice vorbis vpx wavpack wayland webdav webp webserver wma-fixed wmf x264 x265 xa xattr xcb xcomposite xdg xerces-c xim xine xkb xml xmp xnest xorg xpm xrandr xsm xv xvfb xvid xvmc zlib zvbi" ABI_X86="32 64" ALSA_CARDS="intel8x0" APACHE2_MODULES="authn_core authz_core socache_shmcb unixd actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" CALLIGRA_FEATURES="kexi words flow plan sheets stage tables krita karbon braindump author" CAMERAS="ptp2" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" CPU_FLAGS_X86="mmx mmxext popcnt sse sse2 sse3 sse4_1 sse4_2 ssse3" CURL_SSL="gnutls" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf superstar2 timing tsip tripmate tnt ublox ubx" GRUB_PLATFORMS="pc efi-64" INPUT_DEVICES="evdev" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" LINGUAS="ro ro_RO en en_US" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php5-5" PYTHON_SINGLE_TARGET="python2_7" PYTHON_TARGETS="python2_7 python3_4" QEMU_SOFTMMU_TARGETS="i386 arm x86_64 mips mips64" QEMU_USER_TARGETS="i386 x86_64 arm armeb mips" RUBY_TARGETS="ruby20 ruby21" SANE_BACKENDS="gt68xx net" USERLAND="GNU" VIDEO_CARDS="nouveau nv nvidia r600 radeon" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipset ipp2p iface geoip fuzzy condition tee tarpit sysrq steal rawnat logmark ipmark dhcpmac delude chaos account"
Unset:  CC, CPPFLAGS, CTARGET, CXX, EMERGE_DEFAULT_OPTS, INSTALL_MASK, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, USE_PYTHON
Comment 1 Sorin Panca 2015-09-26 09:59:58 UTC
I also found this problem reported on proxmox forum: http://forum.proxmox.com/threads/23636-Proxmox-4-No-display-with-kvm-virtual-machine a few days ago.
Comment 2 Mike louth 2015-09-28 17:48:33 UTC
I've run into this problem as well ("Guest has not initialized the display (yet)."). After numerous tests, I've found this behaviour is peculiar to the qemu 2.4.0-r1 running on any 4.2.x kernel. Qemu 2.4.0-r1 on kernel 4.1.6 works for on my rig.

emerge --info

Portage 2.2.22 (python 2.7.10-final-0, default/linux/amd64/13.0/no-multilib, gcc-4.9.3, glibc-2.21-r1, 4.2.1-gentoo x86_64)
=================================================================
System uname: Linux-4.2.1-gentoo-x86_64-Intel-R-_Core-TM-_i7_CPU_Q_840_@_1.87GHz-with-gentoo-2.2
KiB Mem:     8106544 total,   5652132 free
KiB Swap:    8000364 total,   8000364 free
Timestamp of repository gentoo: Sun, 27 Sep 2015 18:45:02 +0000
sh bash 4.3_p42
ld GNU ld (Gentoo 2.25.1 p1.1) 2.25.1
app-shells/bash:          4.3_p42::gentoo
dev-java/java-config:     2.2.0::gentoo
dev-lang/perl:            5.22.0::gentoo
dev-lang/python:          2.7.10::gentoo, 3.3.5-r2::gentoo, 3.4.3::gentoo
dev-util/cmake:           3.3.2::gentoo
dev-util/pkgconfig:       0.28-r3::gentoo
sys-apps/baselayout:      2.2::gentoo
sys-apps/openrc:          0.17::gentoo
sys-apps/sandbox:         2.9::gentoo
sys-devel/autoconf:       2.13::gentoo, 2.69-r1::gentoo
sys-devel/automake:       1.12.6::gentoo, 1.13.4::gentoo, 1.14.1::gentoo, 1.15::gentoo
sys-devel/binutils:       2.25.1-r1::gentoo
sys-devel/gcc:            4.9.3::gentoo
sys-devel/gcc-config:     1.8::gentoo
sys-devel/libtool:        2.4.6-r1::gentoo
sys-devel/make:           4.1-r1::gentoo
sys-kernel/linux-headers: 4.2::gentoo (virtual/os-headers)
sys-libs/glibc:           2.21-r1::gentoo
Repositories:

gentoo
    location: /usr/portage
    sync-type: rsync
    sync-uri: rsync://rsync.us.gentoo.org/gentoo-portage
    priority: -1000

localhost
    location: /var/lib/layman
    masters: gentoo
    priority: 0                                                                                                                                                                           
                                                                                                                                                                                          
nvidia-drivers-overlay                                                                                                                                                                    
    location: /var/lib/layman/x11-drivers/nvidia-drivers                                                                                                                                  
    masters: gentoo
    priority: 50

ACCEPT_KEYWORDS="amd64 ~amd64"
ACCEPT_LICENSE="*"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-O2 -march=native -pipe"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/share/config /usr/share/gnupg/qualified.txt"
CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/dconf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo"
CXXFLAGS="-O2 -march=native -pipe"
DISTDIR="/usr/portage/distfiles"
EMERGE_DEFAULT_OPTS="--quiet-build=n"
FCFLAGS="-O2 -pipe"
FEATURES="assume-digests binpkg-logs collision-protect config-protect-if-modified distlocks ebuild-locks fixlafiles merge-sync news parallel-fetch preserve-libs protect-owned sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync"
FFLAGS="-O2 -pipe"
GENTOO_MIRRORS="http://gentoo.osuosl.org/ ftp://ftp.osuosl.org/pub/gentoo http://lug.mtu.edu/gentoo ftp://lug.mtu.edu/gentoo ftp://mirrors.rit.edu ftp://ftpussg.iu.edu http://gentoo.mirrors.easynews.com ftp://gentoo.arcticnetwork.ca/pub/gentoo http://gentoo.arcticnetwork.ca"
LANG="en_US.UTF-8"
LDFLAGS="-Wl,-O1 -Wl,--as-needed"
MAKEOPTS="-j5"
PKGDIR="/usr/portage/packages"
PORTAGE_CONFIGROOT="/"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --omit-dir-times --compress --force --whole-file --delete --stats --human-readable --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages"
PORTAGE_TMPDIR="/var/tmp"
USE="X acl alsa amd64 berkdb bluetooth bzip2 cdr cli cracklib crypt cxx dbus declarative dri dvd exif flac fortran gallium gdbm gif gpm iconv ipv6 jpeg kde mmx mmxext modules ncurses nls nptl nsplugin ogg opengl openmp pam pcre png policykit qt3support qt5 readline sdl seccomp session sse sse2 sse3 sse4_1 sse4_2 ssl ssse3 svg systemd tcpd tiff truetype udev unicode usb vorbis xml zlib" ABI_X86="64" ALSA_CARDS="ali5451 als4000 atiixp atiixp-modem bt87x ca0106 cmipci emu10k1x ens1370 ens1371 es1938 es1968 fm801 hda-intel intel8x0 intel8x0m maestro3 trident usb-audio via82xx via82xx-modem ymfpci" APACHE2_MODULES="authn_core authz_core socache_shmcb unixd actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" CALLIGRA_FEATURES="kexi words flow plan sheets stage tables krita karbon braindump author" CAMERAS="ptp2" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" CPU_FLAGS_X86="mmx sse sse2 sse3 ssse3 sse4_1 sse4_2" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf superstar2 timing tsip tripmate tnt ublox ubx" INPUT_DEVICES="keyboard mouse evdev synaptics" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" LINGUAS="en" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php5-5" PYTHON_SINGLE_TARGET="python2_7" PYTHON_TARGETS="python2_7 python3_4" RUBY_TARGETS="ruby20 ruby21" USERLAND="GNU" VIDEO_CARDS="nvidia vesa" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipset ipp2p iface geoip fuzzy condition tee tarpit sysrq steal rawnat logmark ipmark dhcpmac delude chaos account"
USE_PYTHON="2.7 3.4"
Unset:  CC, CPPFLAGS, CTARGET, CXX, INSTALL_MASK, LC_ALL, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS
Comment 3 Mike louth 2015-09-29 18:15:52 UTC
I decided to add some more info on these tests I've done with qemu and the kernels.  

1.) All kernel versions I tested were gentoo-sources

2.) seabios is not the culprit: a temporary forced-install of seabios-1.8.2 with qemu-2.3.1 running on a gentoo-sources 4.2.x kernel works.

3.) I have just a single video card (nvidia geforce 445m). 

4.) So far all attempts to boot my VM with qemu-2.4.0-r1 on a 4.2.x kernel fail with the aforementioned "Guest has not initialized the display (yet)." message. A subsequent reboot of the VM from a 4.1.6 kernel shows no evidence (in the VM logs) of the previous failed VM boot attempt from the 4.2.x kernel--The VM is never starting when booted from the 4.2.x kernel but I don't have the debugging chops to determine why.
Comment 4 SpanKY gentoo-dev 2015-10-10 00:44:25 UTC
is the iso public ?  can you post links to it and the exact commands you're using to boot it ?
Comment 5 Alex Xu (Hello71) 2015-10-10 02:37:58 UTC
(In reply to SpanKY from comment #4)
> is the iso public ?  can you post links to it and the exact commands you're
> using to boot it ?

you don't need any drive, just use "qemu-system-x86_64 -enable-kvm" (no other options required). <qemu-2.4 will display the BIOS and iPXE (if configured) whereas >=2.4 will display a black screen. if you use VNC or SPICE or open and close the monitor then the message will be displayed.
Comment 6 Mike louth 2015-10-10 19:45:35 UTC
Just to add to Alex Hu's point.

If I run "qemu-system-x86_64 --enable-kvm" (using qemu executable from qemu 2.4.x) when the host is running a 4.1.x kernel or less I can boot into the iPXE command. If I run that same command when the host is running a 4.2.x kernel, I get the message "Guest has not initialized the display (yet)."
Comment 7 SpanKY gentoo-dev 2015-10-10 21:25:41 UTC
i haven't upgraded to linux-4.2 because it fails to boot on my system
Comment 8 SpanKY gentoo-dev 2015-10-13 19:01:31 UTC
i spent time bisecting the kernel back and it was kvm changes that were breaking it :).  those changes have been reverted upstream and should be in linux-4.2.4.  so when that is released, i'd give that a spin to see if it helps with your problem too.
Comment 9 Alex Xu (Hello71) 2015-10-18 15:37:31 UTC
patch landed upstream in cfed1e3de4764fb5b6a02c93ec246424b3bffd21 (4.3-rc5+). maybe we should backport this to 4.2?
Comment 10 SpanKY gentoo-dev 2015-10-19 01:47:45 UTC
(In reply to Alex Xu (Hello71) from comment #9)

cfed1e3de4764fb5b6a02c93ec246424b3bffd21 is a merge commit.  i can't really see us backporting non-critical (really just security) changes, but that's for the kernel team.

are you saying that after upgrading your system to the latest mainline, this bug no longer exists ?
Comment 11 Alex Xu (Hello71) 2015-10-19 11:48:45 UTC
(In reply to SpanKY from comment #10)
> (In reply to Alex Xu (Hello71) from comment #9)
> 
> cfed1e3de4764fb5b6a02c93ec246424b3bffd21 is a merge commit.  i can't really
> see us backporting non-critical (really just security) changes, but that's
> for the kernel team.
> 
> are you saying that after upgrading your system to the latest mainline, this
> bug no longer exists ?

the merge commit says "SMM" which I diagnosed to be the cause of the issues (at least its emulation); I couldn't find this in the KVM parents, although I imagine it shouldn't be too hard.

yes, QEMU initializes the display properly on my Nehalem now.
Comment 12 SpanKY gentoo-dev 2015-10-19 15:39:15 UTC
considering all the changes are in the upstream kernel, i'm not sure there's anything for us to do.  upstream already said they queued the patches for 4.2.4.
Comment 13 fkater 2015-10-23 10:26:05 UTC
FYI: vanilla kernel 4.2.4 still does not solve that. Tested on arm64
with qemu-2.4.0-r1. Downgrade to qemu-2.3.0-r5 works.
Comment 14 Mike louth 2015-11-02 20:03:35 UTC
For me the release of the gentoo-sources 4.3 kernel has solved this problem.

My VM starts and id I simply run "qemu-system-x86_64 --enable-kvm", I can enter the iPXE pre-boot command environment
Comment 15 fkater 2015-11-04 09:47:12 UTC
(In reply to Mike louth from comment #14)
> For me the release of the gentoo-sources 4.3 kernel has solved this problem.
> 
> My VM starts and id I simply run "qemu-system-x86_64 --enable-kvm", I can
> enter the iPXE pre-boot command environment

Good to know (just tested: 4.2.5 that does NOT fix it here).
Comment 16 fkater 2015-11-04 10:23:04 UTC
(In reply to F. Kater from comment #15)
> (In reply to Mike louth from comment #14)
> > For me the release of the gentoo-sources 4.3 kernel has solved this problem.
> > 
> > My VM starts and id I simply run "qemu-system-x86_64 --enable-kvm", I can
> > enter the iPXE pre-boot command environment
> 
> Good to know (just tested: 4.2.5 that does NOT fix it here).

Yes, kernel 4.3 fixes it here, too. Qemu 2.4.0 works with it now.
Comment 17 fkater 2015-11-05 16:41:03 UTC
FYI: While qemu-2.4.0 works again with kernel 4.3 as stated above,
I noticed a memory leak with roughly 1 MB each 5 seconds. (This
may or or may not be related to this topic.) So, kernel 4.3 is no
option yet here.
Comment 18 Sorin Panca 2015-11-30 14:16:53 UTC
I can confirm it works with kernel 4.3.0 and qemu 2.4.1. If there are other problems (like memory leaks, etc.), another bug report should be opened.
This doesn't mean the combination of software versions in the bug report title works now, so I will close this bug as obsolete.
Thank you!