Bug 1245551

Summary: switch runlevel from 5 to 3 got black screen
Product: Red Hat Enterprise Linux 7 Reporter: mazhang <mazhang>
Component: qemu-kvm-rhevAssignee: Radim Krčmář <rkrcmar>
Status: CLOSED CURRENTRELEASE QA Contact: Virtualization Bugs <virt-bugs>
Severity: medium Docs Contact:
Priority: medium    
Version: 7.2CC: hhuang, huding, juzhang, mazhang, michen, virt-maint, xfu
Target Milestone: rc   
Target Release: ---   
Hardware: x86_64   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2015-09-16 17:11:16 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Attachments:
Description Flags
log from guest /var/log/messages none

Description mazhang 2015-07-22 09:35:03 UTC 
Description of problem:
switch runlevel from 5 to 3 got black screen

Version-Release number of selected component (if applicable):

Host:
3.10.0-292.el7.x86_64
qemu-kvm-rhev-2.3.0-12.el7.x86_64

Guest:
3.10.0-292.el7.x86_64
gnome-session-3.14.0-4.el7.x86_64
xorg-x11-utils-7.5-13.1.el7.x86_64
xorg-x11-drv-qxl-0.1.1-16.el7.x86_64
xorg-x11-server-utils-7.7-4.el7.x86_64
systemd-219-7.el7.x86_64

How reproducible:
always

Steps to Reproduce:
1.Command line:
/usr/libexec/qemu-kvm \
-M pc \
-cpu SandyBridge \
-nodefaults -rtc base=utc -no-hpet \
-m 4G \
-smp 4,cores=2,threads=2,sockets=1 \
-enable-kvm \
-name rhel7.2 \
-uuid 990ea161-6b67-47b2-b803-19fb01d30d12 \
-smbios type=1,manufacturer='Red Hat',product='RHEV Hypervisor',version=el6,serial=koTUXQrb,uuid=feebc8fd-f8b0-4e75-abc3-e63fcdb67170 \
-k en-us \
-monitor stdio \
-qmp tcp:0:6661,server,nowait \
-serial unix:/tmp/serial0,server,nowait \
-boot menu=on \
-bios /usr/share/seabios/bios.bin \
-spice port=5900,disable-ticketing \
-device qxl-vga,id=vga0 \
-netdev tap,id=hostnet0,vhost=on \
-device virtio-net-pci,netdev=hostnet0,id=net0,mac=54:52:00:B6:40:21 \
-drive file=/home/rhel7.2-64.qcow2,if=none,id=drive-virtio-disk0,format=qcow2,cache=none,werror=stop,rerror=stop,aio=threads \
-device virtio-blk-pci,scsi=off,bus=pci.0,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=0 \

2. After guest system booting up, login desktop then execute "init 3".

3.

Actual results:
Black screen.

Expected results:
switch to runlevel 3.

Additional info:
Comment 2 mazhang 2015-07-22 10:31:12 UTC 
Created attachment 1054773 [details]
log from guest /var/log/messages
Comment 3 Radim Krčmář 2015-07-23 14:55:11 UTC 
`init 3` should kill graphic interface, so some level of blackness is expected.
There is no cursor and other VT, accessed by (Ctrl+)Alt+F2, has no login prompt?
Comment 4 mazhang 2015-07-27 02:22:30 UTC 
(In reply to Radim Krčmář from comment #3)
> `init 3` should kill graphic interface, so some level of blackness is
> expected.
> There is no cursor and other VT, accessed by (Ctrl+)Alt+F2, has no login
> prompt?

Yes, it shows login prompt when switch to Alt+F2.
But I think it's not that kind of blackness, normally `init 3` will switch to text mode and show login prompt in current terminal, but this time just got black with a flash underline, no login prompt.
Also test with RHEL7.1 GA guest not hit this problem.
Comment 7 Radim Krčmář 2015-09-16 17:11:16 UTC 
This bug can't be reproduced in latest release.  Please reopen if you hit it again.