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Bug 2002325 - Use -machine graphics=off instead of sga device
Summary: Use -machine graphics=off instead of sga device
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 9
Classification: Red Hat
Component: libguestfs
Version: 9.0
Hardware: Unspecified
OS: Unspecified
high
high
Target Milestone: rc
: ---
Assignee: Richard W.M. Jones
QA Contact: YongkuiGuo
URL:
Whiteboard:
Depends On: 2002392 2003092
Blocks: 2000845
TreeView+ depends on / blocked
 
Reported: 2021-09-08 14:49 UTC by Richard W.M. Jones
Modified: 2022-05-17 12:39 UTC (History)
7 users (show)

Fixed In Version: libguestfs-1.45.6-13.el9
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2022-05-17 12:28:37 UTC
Type: Bug
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Issue Tracker RHELPLAN-96564 0 None None None 2021-09-08 14:49:57 UTC
Red Hat Product Errata RHBA-2022:2317 0 None None None 2022-05-17 12:29:12 UTC

Description Richard W.M. Jones 2021-09-08 14:49:36 UTC 
Description of problem:

libguestfs currently uses SGA (an extension of seabios)
to enable serial output of BIOS messages at boot.  However
we want to deprecate this device in RHEL 9.  (Unfortunately
it has already been removed.)

There is a new alternative to this:

 -machine graphics=off

which makes seabios direct all messages to the serial port.

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

libguestfs-1.45.6-12.el9.x86_64

How reproducible:

?

Steps to Reproduce:
1. export LIBGUESTFS_BACKEND=direct
2. libguestfs-test-tool

See if the BIOS messages appear in the output, eg:

  SGABIOS $Id$ (mockbuild@) Fri Apr 16 19:26:02 UTC 2021
  Term: 80x24
  4 0
  SeaBIOS (version 1.14.0-5.el9)
  Booting from ROM...

If they are not present then that's a problem.
Comment 1 Richard W.M. Jones 2021-09-13 09:45:07 UTC 
Upstream fix:
https://github.com/libguestfs/libguestfs/commit/e14ff937422115e23094ca4cce80ec9fb01c10b3
Comment 4 YongkuiGuo 2021-09-14 06:27:21 UTC 
1. Test with libguestfs-1.45.6-12.el9:

# LIBGUESTFS_BACKEND=direct libguestfs-test-tool
...
/usr/libexec/qemu-kvm \
    -global virtio-blk-pci.scsi=off \
    -no-user-config \
    -nodefaults \
    -display none \
    -machine accel=kvm:tcg \
    -cpu max \
    -m 1280 \
    -no-reboot \
    -rtc driftfix=slew \
    -no-hpet \
    -global kvm-pit.lost_tick_policy=discard \
    -kernel /var/tmp/.guestfs-0/appliance.d/kernel \
    -initrd /var/tmp/.guestfs-0/appliance.d/initrd \
    -object rng-random,filename=/dev/urandom,id=rng0 \
    -device virtio-rng-pci,rng=rng0 \
    -device virtio-scsi-pci,id=scsi \
    -drive file=/tmp/libguestfs9ahDOj/scratch1.img,cache=unsafe,format=raw,id=hd0,if=none \
    -device scsi-hd,drive=hd0 \
    -drive file=/var/tmp/.guestfs-0/appliance.d/root,snapshot=on,id=appliance,cache=unsafe,if=none,format=raw \
    -device scsi-hd,drive=appliance \
    -device virtio-serial-pci \
    -serial stdio \
    -device sga \
    -chardev socket,path=/tmp/libguestfs7MA7a6/guestfsd.sock,id=channel0 \
    -device virtserialport,chardev=channel0,name=org.libguestfs.channel.0 \
    -append "panic=1 console=ttyS0 edd=off udevtimeout=6000 udev.event-timeout=6000 no_timer_check printk.time=1 cgroup_disable=memory usbcore.nousb cryptomgr.notests tsc=reliable 8250.nr_uarts=1 root=UUID=2397a64b-b6ac-4e5b-9987-cbfde4dca4be selinux=0 guestfs_verbose=1 TERM=xterm-256color"
Could not open option rom 'sgabios.bin': No such file or directory
[    0.000000] Linux version 5.14.0-1.el9.x86_64 (mockbuild.eng.bos.redhat.com) (gcc (GCC) 11.2.1 20210728 (Red Hat 11.2.1-2), GNU ld version 2.35.2-9.el9) #1 SMP Mon Aug 30 21:21:29 EDT 2021
...

2. Verify with libguestfs-1.45.6-13.el9

# LIBGUESTFS_BACKEND=direct libguestfs-test-tool

...
/usr/libexec/qemu-kvm \
    -global virtio-blk-pci.scsi=off \
    -no-user-config \
    -nodefaults \
    -display none \
    -machine accel=kvm:tcg,graphics=off \
    -cpu max \
    -m 1280 \
    -no-reboot \
    -rtc driftfix=slew \
    -no-hpet \
    -global kvm-pit.lost_tick_policy=discard \
    -kernel /var/tmp/.guestfs-0/appliance.d/kernel \
    -initrd /var/tmp/.guestfs-0/appliance.d/initrd \
    -object rng-random,filename=/dev/urandom,id=rng0 \
    -device virtio-rng-pci,rng=rng0 \
    -device virtio-scsi-pci,id=scsi \
    -drive file=/tmp/libguestfsQp1dMu/scratch1.img,cache=unsafe,format=raw,id=hd0,if=none \
    -device scsi-hd,drive=hd0 \
    -drive file=/var/tmp/.guestfs-0/appliance.d/root,snapshot=on,id=appliance,cache=unsafe,if=none,format=raw \
    -device scsi-hd,drive=appliance \
    -device virtio-serial-pci \
    -serial stdio \
    -chardev socket,path=/tmp/libguestfsdqveLY/guestfsd.sock,id=channel0 \
    -device virtserialport,chardev=channel0,name=org.libguestfs.channel.0 \
    -append "panic=1 console=ttyS0 edd=off udevtimeout=6000 udev.event-timeout=6000 no_timer_check printk.time=1 cgroup_disable=memory usbcore.nousb cryptomgr.notests tsc=reliable 8250.nr_uarts=1 root=UUID=fecbf277-aa85-4ad0-9777-cfedb39300e5 selinux=0 guestfs_verbose=1 TERM=xterm-256color"
\x1bc\x1b[?7l\x1b[2J\x1b[0mSeaBIOS (version 1.14.0-6.el9)
Booting from ROM..\x1bc\x1b[?7l\x1b[2J[    0.000000] Linux version 5.14.0-1.el9.x86_64 (mockbuild.eng.bos.redhat.com) (gcc (GCC) 11.2.1 20210728 (Red Hat 11.2.1-2), GNU ld version 2.35.2-9.el9) #1 SMP Mon Aug 30 21:21:29 EDT 2021
Comment 6 errata-xmlrpc 2022-05-17 12:28:37 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (new packages: libguestfs), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2022:2317
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