This change was made by a bot.
** Changed in: linux (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1828665
Title:
[regression] Reboot after dpkg update set invalid Graphics resolutions
(Dual Monitor) since ~7th/8th May
Status in linux package in Ubuntu:
Confirmed
Status in mutter package in Ubuntu:
Incomplete
Bug description:
Now at Ubuntu 18.04.2 LTS, Gnome 3.28.2
Deduction. The user device settings menu for desktop control dual
monitors offer the correct modes available. The Bionic Beaver update
does something different.
Dual monitor configuration (Formerly Primary on Display Port 3840x2160
30Hz, Secondary on HDMI 3840x2160 30Hz on a three video output Intel
HD620) for Cancer Research using LibreOffice Calc across both.
Upgrades permitted manually rather than auto and usually done within a
day. Since five months both monitors were operating HDMI (Display
port not connected, not used) with Primary on HDMI2 and Secondary on
HDMI1, both at 3840x2160 30Hz. Neither monitor is capable of 60Hz at
UHD which is quite alright for office work. When installing such
devices, strictly only the 3840x2160 30Hz mode is available on the
settings page.
After the most recent update (7/8th may), the primary screen was blank
on reboot (abnormal) and the secondary screen showed the extended
desktop without menus (as usual). Rebooting to see the primary was
unsuccessful and then the secondary monitor failed completely
(confirmed the next day as graphics card hardware, broken). Cold
disconnect of the secondary (awaiting repair), another boot brought up
Primary display only yet flickering occasionally.
Primary Display. Considering the possibility of error in the
graphics since the update - the Device settings (normal user page)
revealed that the update had changed the output to HDMI 4096 lines
(which the PC monitor can't do and the user can't select - outside
specification). I was in such a hurry to save it also from damage
that I put back the resolution to 3840x2160 30Hz immediately, without
looking at which frequency had been set with the 4096 value. Now on
rebooting, the display settings menu shows appropriately only
3840x2160 30 Hz as choice. It seems the Bionic Beaver update needed
something else and set 4096 (which the user can't and notwithstanding
the original user configuration).
Secondary Display. I don't know what it set, but it blew the monitor
card. The linux sent either 3840 at 60 Hz or 4096 at any frequency
without negociation, without being able to respect the user settings.
It's also possible that it used a very low resolution for a few
seconds which the secondary monitor can't do either; it's (well, it
was) a real PC monitor with choices of DP or HDMI yet can jump into
various modes (such as 60/75Hz for gamers). After some Ubuntu upgrades
in the past (blank secondary screen), it was necessary to go back into
the monitor menu to switch off again the gamer mode.
Something similar happened in 2017 with Light Ubuntu Update. The
Secondary (very expensive) display making very alarming noises and
staying blank for half a day. Now it's truly broken (I know it's the
driver circuit and which parts). Waiting for repair or replacement,
the system is in use now with the same Primary PC monitor and a UHD
television as secondary to get by.
I worked 20 years on PC systems and monitors (for ship control) and
accept that in the past we nearly always used a simple basic portable
VGA monitor for system upgrades, then reconnected the user's gear
later. I think I'll only do (and postpone) Linux upgrades from now
using a spare single desktop monitor at 1920x1080. That was a very
worrying experience.
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: xorg 1:7.7+19ubuntu7.1
ProcVersionSignature: Ubuntu 4.15.0-48.51-generic 4.15.18
Uname: Linux 4.15.0-48-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.6
Architecture: amd64
CompizPlugins: No value set for
`/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: None
Date: Sat May 11 11:21:30 2019
DistUpgraded: Fresh install
DistroCodename: bionic
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
Intel Corporation HD Graphics 620 [8086:5916] (rev 02) (prog-if 00 [VGA
controller])
Subsystem: Holco Enterprise Co, Ltd/Shuttle Computer HD Graphics 620
[1297:4052]
InstallationDate: Installed on 2018-09-13 (239 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64
(20180725)
Lsusb:
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 004: ID 0bda:0129 Realtek Semiconductor Corp. RTS5129 Card
Reader Controller
Bus 001 Device 003: ID 046d:c30a Logitech, Inc. iTouch Composite
Bus 001 Device 002: ID 046d:c52b Logitech, Inc. Unifying Receiver
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: Shuttle Inc. DS77U
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-48-generic
root=UUID=9cdb8aeb-51e4-4cb5-95e7-b58572bf4dd7 ro quiet splash vt.handoff=1
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/12/2018
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1.08
dmi.board.asset.tag: Default string
dmi.board.name: FS77U
dmi.board.vendor: Shuttle Inc.
dmi.board.version: 1.0
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 9
dmi.chassis.vendor: Default string
dmi.chassis.version: Default string
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvr1.08:bd03/12/2018:svnShuttleInc.:pnDS77U:pvrV1.0:rvnShuttleInc.:rnFS77U:rvr1.0:cvnDefaultstring:ct9:cvrDefaultstring:
dmi.product.family: D
dmi.product.name: DS77U
dmi.product.version: V1.0
dmi.sys.vendor: Shuttle Inc.
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.95-1~18.04.1
version.libgl1-mesa-dri: libgl1-mesa-dri 18.2.8-0ubuntu0~18.04.2
version.libgl1-mesa-glx: libgl1-mesa-glx 18.2.8-0ubuntu0~18.04.2
version.xserver-xorg-core: xserver-xorg-core 2:1.19.6-1ubuntu4.2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:18.0.1-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel
2:2.99.917+git20171229-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-2
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