Bug 211876 - vt(4) odd scrolling behavior
Summary: vt(4) odd scrolling behavior
Status: New
Alias: None
Product: Base System
Classification: Unclassified
Component: kern (show other bugs)
Version: 11.0-RC1
Hardware: Any Any
: --- Affects Only Me
Assignee: freebsd-bugs mailing list
URL:
Keywords: vt
Depends on:
Blocks:
 
Reported: 2016-08-15 19:18 UTC by Kyle Evans
Modified: 2019-09-20 11:41 UTC (History)
2 users (show)

See Also:


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Description Kyle Evans freebsd_committer 2016-08-15 19:18:16 UTC
Hello!

Pretty much immediately after the beastie prompt, I experience some odd scrolling behavior: http://files.kyle-evans.net/vt_scrolling.mp4 (12.5 MB)

I've experienced this with 11.0-RC1 install media, as well as setting kern.vty=vt on a working 10.3-RELEASE system.

Machine is a Dell Optiplex 160 w/ an Intel Atom 330. pciconf output:


root@slowbro:~ # pciconf -lv
hostb0@pci0:0:0:0:      class=0x060000 card=0x06711039 chip=0x06711039 rev=0x00 hdr=0x00
    vendor     = 'Silicon Integrated Systems [SiS]'
    device     = '671MX'
    class      = bridge
    subclass   = HOST-PCI
pcib1@pci0:0:1:0:       class=0x060400 card=0x00000000 chip=0x00031039 rev=0x00 hdr=0x01
    vendor     = 'Silicon Integrated Systems [SiS]'
    device     = 'AGP Port (virtual PCI-to-PCI bridge)'
    class      = bridge
    subclass   = PCI-PCI
isab0@pci0:0:2:0:       class=0x060100 card=0x00000000 chip=0x09681039 rev=0x01 hdr=0x00
    vendor     = 'Silicon Integrated Systems [SiS]'
    device     = 'SiS968 [MuTIOL Media IO]'
    class      = bridge
    subclass   = PCI-ISA
ohci0@pci0:0:3:0:       class=0x0c0310 card=0x02c31028 chip=0x70011039 rev=0x0f hdr=0x00
    vendor     = 'Silicon Integrated Systems [SiS]'
    device     = 'USB 1.1 Controller'
    class      = serial bus
    subclass   = USB
ohci1@pci0:0:3:1:       class=0x0c0310 card=0x02c31028 chip=0x70011039 rev=0x0f hdr=0x00
    vendor     = 'Silicon Integrated Systems [SiS]'
    device     = 'USB 1.1 Controller'
    class      = serial bus
    subclass   = USB
ehci0@pci0:0:3:3:       class=0x0c0320 card=0x02c31028 chip=0x70021039 rev=0x00 hdr=0x00
    vendor     = 'Silicon Integrated Systems [SiS]'
    device     = 'USB 2.0 Controller'
    class      = serial bus
    subclass   = USB
atapci0@pci0:0:5:0:     class=0x010187 card=0x02c31028 chip=0x11831039 rev=0x03 hdr=0x00
    vendor     = 'Silicon Integrated Systems [SiS]'
    device     = 'SATA Controller / IDE mode'
    class      = mass storage
    subclass   = ATA
pcib2@pci0:0:6:0:       class=0x060400 card=0x00041039 chip=0x000a1039 rev=0x00 hdr=0x01
    vendor     = 'Silicon Integrated Systems [SiS]'
    device     = 'PCI-to-PCI bridge'
    class      = bridge
    subclass   = PCI-PCI
pcib3@pci0:0:7:0:       class=0x060400 card=0x00041039 chip=0x000a1039 rev=0x00 hdr=0x01
    vendor     = 'Silicon Integrated Systems [SiS]'
    device     = 'PCI-to-PCI bridge'
    class      = bridge
    subclass   = PCI-PCI
hdac0@pci0:0:15:0:      class=0x040300 card=0x02c31028 chip=0x75021039 rev=0x00 hdr=0x00
    vendor     = 'Silicon Integrated Systems [SiS]'
    device     = 'Azalia Audio Controller'
    class      = multimedia
    subclass   = HDA
vgapci0@pci0:1:0:0:     class=0x030000 card=0x02c31028 chip=0x63511039 rev=0x10 hdr=0x00
    vendor     = 'Silicon Integrated Systems [SiS]'
    device     = '771/671 PCIE VGA Display Adapter'
    class      = display
    subclass   = VGA
bge0@pci0:2:0:0:        class=0x020000 card=0x02c31028 chip=0x168414e4 rev=0x10 hdr=0x00
    vendor     = 'Broadcom Corporation'
    device     = 'NetXtreme BCM5764M Gigabit Ethernet PCIe'
    class      = network
    subclass   = ethernet
none0@pci0:3:0:0:       class=0x028000 card=0x000c1028 chip=0x431514e4 rev=0x01 hdr=0x00
    vendor     = 'Broadcom Corporation'
    device     = 'BCM4312 802.11b/g LP-PHY'
    class      = network
Comment 1 Kyle Evans freebsd_committer 2016-08-15 21:01:30 UTC
Apologies- missed some details:

* The scrolling indeed never stops -- the system is effectively unusable at the local console 
* The bsdinstall dialog box is also scrolling quickly, similarly to the text in the picture, making for an incredibly uncomfortable bsdinstall experience.
Comment 2 Kyle Evans freebsd_committer 2016-08-18 14:46:41 UTC
Also relevant- I've just discovered this only happens with with hw.vga.textmode=0. Is this actually a bug, then, or perhaps something not supported?
Comment 3 Ed Maste freebsd_committer 2019-09-20 10:56:53 UTC
Is this still reproducible for you? I haven't observed this on any of my hardware.
Comment 4 Kyle Evans freebsd_committer 2019-09-20 11:41:56 UTC
Oh yeah, still reproducible... I was trying to track this down the other week, but ran out of time.