Problem reproduced on separate (virtual) machine, unmodified ubuntu live image.
- Host system AMD Phenom II X6 1090T with 16GB RAM Ubuntu 14.04.4 LTS
- virtualbox 14.3.36-dfsg-...
- SATA 0: 8GB VMDK drive (new)
- SATA 1: CD/ROM: ubuntu-18.04-desktop-amd64.iso
- Base memory: 4GB (important, if you use 1GB, ubuntu will boot to
desktop but nothing works)
must have enough ram on host machine to permit this
- Specific Virtual machine -> System -> Motherboard: Enable EFI: On
otherwise it will not boot
- Boot menu: TRY ubuntu without installing
- Show Applications (dash)-> Terminal
- Show Applications -> Settings-> Universal Access -> Always Show Universal
Access Menu: On
- don't dismiss settings, we will use it about 8 steps below.
- Universal Access menu (round man in circle on top panel) -> Zoom: on
- Move pointer to upper left corner of desktop: note left panel (launcher)
icons
cut in hafl, note top panel cut in half
- move to top right
- click on whats left of universal access menu icon to pull down menu, note
it is drawn incorrectly
- move mouse down and to the left and notice how these panels/pull down
menus scroll independently and incorrectly.
- try to turn off the zoom in the univeral access pull down menu. Try to
read the word zoom, now you cant see the control, move to see the control now
you can't see the word. But in this case, you can actually get there.
- turn zoom back on
- move mouse pointer to upper right hand corner. Make sure either the
universal access or the system menu is pulled down
- move mouse down and left to the words "sound keys" in the settings menu
(control panel,
not the pull down menu) for universal access. Leave the mouse pointer
there for a
few seconds. Display will pan to upper right hand corner without
permission.
- If you repeat this without either of the two pull down menus activated,
it will jump
to the highlighted "Universal Access" on the left side of the settings
window.
This jumping action severely interfered with issuing screenshot commands
in terminal and
it will interfere with many other operations as well.
Behavior of program suggests that the screen is being composited of the
following elements:
- desktop background
- application window 1
- application window 2
- application window 3 ...
- top panel
- left panel (launcher)
- pull down menu
The first four items appear to be correctly composited together before applying
the zoom and pan operation but the last three appear to not be composited onto
the desktop+applications before zoom and pan is applied. The size of their
windows has not been enlarged, only the contents.
Add to paragraph about obfuscating the identity of the programs the user
is interacting with: Universal Pull down menu also doesn't have "Help"
or report bug menu items.
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https://bugs.launchpad.net/bugs/1769299
Title:
universal access zoom unusable
Status in xorg package in Ubuntu:
New
Bug description:
Filed by mark on behalf of low vision user Ken. Ken is able to read 56
point type without magnification at normal reading distance and can barely read
the universal access "large text" from a distance of about 2.5 inches from a
26inch monitor at 1360x768. So he really needs magnification and a lot more
than the 2x default I used here for testing. We do not live in the same town
so providing additional details would be slow.
Turned on zoom from the universal access button on top panel.
Default settings were used including Zoom = 2.0, screen part = full
Several areas are corrupted. These zoom and scroll separately from
the rest of the screen and in a way that severely impairs use as
portions may not ever be visible. Portions of these subwindows
cannot be used because you have to move the mouse off them to be able
see them so you can either see or click but not both.
These areas are:
- The top panel
- The left panel (launcher) (intermittently)
- pull down menus, particularly the universal access pull down from the top
panel
Also, the zoom randomly every couple seconds. jumps to a different position
without the user's consent. This appeared to be because text was printed by a
program running in the terminal window (long apt-get install) but continued to
happen even when that window was minimized and even when that program stopped
printing.
These problems persisted with all the other zoom modes. One mode,
however, created new bugs. With "magnifier extends outside of
screen", you lose the ability to see the top and left panels at all;
you can pan over where they would be but they are not drawn. Can't
open the pulldown menu since there is no icon, so who knows how it
would be rendered.
These bugs made it very difficult to get screenshots, especially with
the defective screenshot program gnome-screenshot which ships with
system. Also, the bug-reporting program did not permitted attaching
additional screenshots once spectacle was installed.
Ubuntu 18.04, fresh install, only a few added packages (ham radio
related, chrome). Not using wayland, though a wayland session runs
concurrently with X11 even though no one has logged in with wayland.
Another problem in making the bug report is the irresponsible practice
of failing to identify the software being used. The accessability
man in circle menu does not have a heading to tell you what program is
run for the accessability menu or any of the functions thus invoked.
Nor does the settings. And there is no tooltip, popup, or about menu
item to convey this information to the user. And running a diff on
ps doesn't show any new processes started when zoom is turned on.
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: xorg 1:7.7+19ubuntu7
ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
Uname: Linux 4.15.0-20-generic x86_64
ApportVersion: 2.20.9-0ubuntu7
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Sat May 5 00:04:35 2018
DistUpgraded: Fresh install
DistroCodename: bionic
DistroVariant: ubuntu
GraphicsCard:
NVIDIA Corporation G98 [GeForce 8400 GS Rev. 2] [10de:06e4] (rev a1)
(prog-if 00 [VGA controller])
Subsystem: Micro-Star International Co., Ltd. [MSI] G98 [GeForce 8400 GS
Rev. 2] [1462:1163]
InstallationDate: Installed on 2018-05-05 (0 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
MachineType: Dell Inc. OptiPlex 760
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-20-generic
root=UUID=6a7e27f6-5135-461e-9e6b-fea68756ed37 ro quiet splash vt.handoff=1
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/29/2009
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A03
dmi.board.name: 0M858N
dmi.board.vendor: Dell Inc.
dmi.board.version: A01
dmi.chassis.type: 6
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvrA03:bd04/29/2009:svnDellInc.:pnOptiPlex760:pvr:rvnDellInc.:rn0M858N:rvrA01:cvnDellInc.:ct6:cvr:
dmi.product.name: OptiPlex 760
dmi.sys.vendor: Dell Inc.
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.91-2
version.libgl1-mesa-dri: libgl1-mesa-dri 18.0.0~rc5-1ubuntu1
version.libgl1-mesa-glx: libgl1-mesa-glx 18.0.0~rc5-1ubuntu1
version.xserver-xorg-core: xserver-xorg-core 2:1.19.6-1ubuntu4
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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