[Ubuntu-x-swat] [Bug 1892136] Re: reverse prime produces corrupted output on specific resolutions

2020-11-05 Thread Aleksander Miera
Fixed in upstream 1.20
https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/539

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Title:
  reverse prime produces corrupted output on specific resolutions

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[Ubuntu-x-swat] [Bug 1892136] Re: reverse prime produces corrupted output on specific resolutions

2020-11-04 Thread Aleksander Miera
Fixed in upstream master
https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/529

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Title:
  reverse prime produces corrupted output on specific resolutions

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[Ubuntu-x-swat] [Bug 1892136] Re: reverse prime produces corrupted output on specific resolutions

2020-10-06 Thread Aleksander Miera
@vanvugt is there any chance this gets merged? Preferably on Xorg's end,
if you can give me a hint on whom to tag there it would be most
appreciated.

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  reverse prime produces corrupted output on specific resolutions

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[Ubuntu-x-swat] [Bug 1892136] Re: reverse prime produces corrupted output on specific resolutions

2020-08-27 Thread Aleksander Miera
Managed to reproduce on fresh download 20.10, too. OTOH, I remember
seeing that gone in some cases on 20.04. I wonder what the exact cases
are, as apparently this seems more complicated than "reproduces always".

** Tags added: groovy

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  reverse prime produces corrupted output on specific resolutions

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[Ubuntu-x-swat] [Bug 1892136] Re: reverse prime produces corrupted output on specific resolutions

2020-08-27 Thread Aleksander Miera
Just reproduced on 20.04.
xserver-xorg-core:
  Installed: 2:1.20.8-2ubuntu2.2
  Candidate: 2:1.20.8-2ubuntu2.2

No reproduction on 20.10 build, but it was tested on a different machine
and issue might be hw-dependent. Te be confirmed on the same computer
soon.

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Title:
  reverse prime produces corrupted output on specific resolutions

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[Ubuntu-x-swat] [Bug 1892136] [NEW] reverse prime produces corrupted output on specific resolutions

2020-08-19 Thread Aleksander Miera
Public bug reported:

The issue has initially been discovered for resolution 1366x768 on a
DisplayLink (evdi)-backed device, but applies also to UDL, as well as
reverse prime setups (rendering on Intel, output through NVidia).

The issue manifests with 1366x768 and several other resolutions only,
due to the fact that the GPU seems to use 64-aligned framebuffer stride.
This is "accidentally" fine with the most popular VGA resolutions (e.g.
assuming 32bits/4bytes per pixel and FullHD, the stride would be 1920*4
-> 7680, which is divisible by 64 w/o a remainder, yet 1366*4=5464,
5464/64 = 85.375). The proposed fix is to update the stride with the
GPU-provided value instead of the Xorg-calculated one at the stage of
sharing the pixmap between GPUs. Doing that at earlier stage would
probably require distinguishing between allocation of a FB and a generic
pixmap, which is the same for Xorg.

Issue for sure was seen on 18.04 and 19.04, probably still there for
20.04.

Upstream report:
https://gitlab.freedesktop.org/xorg/xserver/-/issues/889

And posted (not yet integrated) fix:
https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/496

** Affects: xorg-server (Ubuntu)
 Importance: Undecided
 Status: New

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Title:
  reverse prime produces corrupted output on specific resolutions

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[Ubuntu-x-swat] [Bug 1875015] Re: Ubuntu 20.04 and Displaylink is extremely slow

2020-07-28 Thread Aleksander Miera
Assigning to xserver.
Upstream bug report is here: 
https://gitlab.freedesktop.org/xorg/xserver/-/issues/1028

** Bug watch added: gitlab.freedesktop.org/xorg/xserver/-/issues #1028
   https://gitlab.freedesktop.org/xorg/xserver/-/issues/1028

** Package changed: ubuntu => xorg-server (Ubuntu)

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Title:
  Ubuntu 20.04 and Displaylink is extremely slow

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[Ubuntu-x-swat] [Bug 1870512] Re: forced software cursor with PageFlip enabled triggers artifacts on screen

2020-05-29 Thread Aleksander Miera
Fix in Xorg:
https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/447#note_515426

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Title:
  forced software cursor with PageFlip enabled triggers artifacts on
  screen

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[Ubuntu-x-swat] [Bug 1870512] Re: forced software cursor with PageFlip enabled triggers artifacts on screen

2020-05-22 Thread Aleksander Miera
Adding movie depicting the problem. And it happens without actually
moving the mouse, after dragging the window.

** Attachment added: "IMG_1245.MOV"
   
https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1870512/+attachment/5375562/+files/IMG_1245.MOV

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Title:
  forced software cursor with PageFlip enabled triggers artifacts on
  screen

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[Ubuntu-x-swat] [Bug 1870512] Re: forced software cursor with PageFlip enabled triggers artifacts on screen

2020-05-21 Thread Aleksander Miera
Fair point, but question is if it's software cursor from Xserver's
perspective. NVidia driver might be blending the cursor in, while
"emulating HW cursor" on the Xorg's end, right?

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Title:
  forced software cursor with PageFlip enabled triggers artifacts on
  screen

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[Ubuntu-x-swat] [Bug 1870512] Re: forced software cursor with PageFlip enabled triggers artifacts on screen

2020-05-21 Thread Aleksander Miera
A recording would preferably be better, a screenshot might not give the
full picture. Anyway, sure, I shall post it. The case I'm describing is
more extreme, the squares are way bigger and flickering constantly, most
of the time effectively preventing usage of the machine, such messy it
gets.

Plus, is the other user also using SW cursor? In the case described here
it's related purely to that.

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Title:
  forced software cursor with PageFlip enabled triggers artifacts on
  screen

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[Ubuntu-x-swat] [Bug 1870512] Re: forced software cursor with PageFlip enabled triggers artifacts on screen

2020-05-21 Thread Aleksander Miera
I guess the bug on Xorg's end is pretty self-explanatory:
https://gitlab.freedesktop.org/xorg/xserver/-/issues/828
The fix for Xorg's has been smoked-tested recently, seems to be working fine.

** Bug watch added: gitlab.freedesktop.org/xorg/xserver/-/issues #828
   https://gitlab.freedesktop.org/xorg/xserver/-/issues/828

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Title:
  forced software cursor with PageFlip enabled triggers artifacts on
  screen

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[Ubuntu-x-swat] [Bug 1873401] [NEW] xorg lock-up on GPU hotplug

2020-04-17 Thread Aleksander Miera
Public bug reported:

Discovered when testing EVDI-backed screen 
(https://github.com/DisplayLink/evdi).
While adding new device /dev/dri/cardX xorg locks, it can be observed by the 
cursors that stop blinking or menus not responding. Sometimes it is just a 
short (1-2 sec.) pause, but sometimes (hard to state the exact reproduction 
rate, rather rarely) the screen stops completely.
Interestingly enough, if using HW cursor, it moves fine. Keyboard is at least 
partially functional, as it's possible to "bail out" to tty with C-A-Fx and 
kill the session. Anything else is difficult to check, as nothing really 
happens on the screen, it just remains frozen.

When adding 4 GPUs at once (e.g. via config in /etc/modprobe.d according to 
https://support.displaylink.com/knowledgebase/articles/1843660-screen-freezes-after-opening-an-application-only).
 Haven't checked other numbers yet, to be done soon.
The problem occurs, when adding the devices, not enabling their associated 
screens/reading EDID or anything like that.
Also, to be checked with UDL, similar behaviour is expected, but due to the 
fact that it adds only a single device at a time reproducing "complete" freeze 
might be difficult.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: xserver-xorg-core 2:1.20.8-2ubuntu2
ProcVersionSignature: Ubuntu 5.4.0-24.28-generic 5.4.30
Uname: Linux 5.4.0-24-generic x86_64
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CasperMD5CheckResult: skip
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Fri Apr 17 09:24:35 2020
DistUpgraded: Fresh install
DistroCodename: focal
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, including running git bisection searches
GraphicsCard:
 Intel Corporation 4th Gen Core Processor Integrated Graphics Controller 
[8086:0416] (rev 06) (prog-if 00 [VGA controller])
   Subsystem: Dell 4th Gen Core Processor Integrated Graphics Controller 
[1028:060d]
   Subsystem: Dell GK107GLM [Quadro K1100M] [1028:060d]
InstallationDate: Installed on 2020-04-16 (0 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Beta amd64 (20200415)
MachineType: Dell Inc. Dell Precision M3800
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-24-generic 
root=UUID=e0a7aba8-1c09-4367-9d6b-c74b73017fb4 ro quiet splash vt.handoff=7
SourcePackage: xorg-server
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/25/2018
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A12
dmi.board.name: Dell Precision M3800
dmi.board.vendor: Dell Inc.
dmi.board.version: A12
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: Not Specified
dmi.modalias: 
dmi:bvnDellInc.:bvrA12:bd05/25/2018:svnDellInc.:pnDellPrecisionM3800:pvrA12:rvnDellInc.:rnDellPrecisionM3800:rvrA12:cvnDellInc.:ct8:cvrNotSpecified:
dmi.product.name: Dell Precision M3800
dmi.product.sku: Dell Precision M3800
dmi.product.version: A12
dmi.sys.vendor: Dell Inc.
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.101-2
version.libgl1-mesa-dri: libgl1-mesa-dri 20.0.4-1ubuntu1
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.20.8-2ubuntu2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 
2:2.99.917+git20200226-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1

** Affects: xorg-server (Ubuntu)
 Importance: Undecided
 Status: New


** Tags: amd64 apport-bug focal ubuntu

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https://bugs.launchpad.net/bugs/1873401

Title:
  xorg lock-up on GPU hotplug

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[Ubuntu-x-swat] [Bug 1870524] Re: fallback to SW cursor on GPU hotplug

2020-04-06 Thread Aleksander Miera
Reported, issue ID 1008:
https://gitlab.freedesktop.org/xorg/xserver/-/issues/1008

** Bug watch added: gitlab.freedesktop.org/xorg/xserver/-/issues #1008
   https://gitlab.freedesktop.org/xorg/xserver/-/issues/1008

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Title:
  fallback to SW cursor on GPU hotplug

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[Ubuntu-x-swat] [Bug 1870524] [NEW] fallback to SW cursor on GPU hotplug

2020-04-03 Thread Aleksander Miera
Public bug reported:

I guess the title is pretty much self-explanatory.
The issue has been discovered while connecting EVDI-backed device 
(https://github.com/DisplayLink/evdi) with a running Xorg session and led to 
filing of https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1870512
However, fixing the issue with SW cursor is only a partial solution in that 
case, as sticking to SW cursor can potentially hinder performance.

I am aware of this (dix/dispatch.c):
update_desktop_dimensions();

/*   
 * We cannot register the Screen PRIVATE_CURSOR key if cursors are already
 * created, because dix/privates.c does not have relocation code for
 * PRIVATE_CURSOR. Once this is fixed the if() can be removed and we can
 * register the Screen PRIVATE_CURSOR key unconditionally.
 */
if (!dixPrivatesCreated(PRIVATE_CURSOR))
dixRegisterScreenPrivateKey(, pScreen,
PRIVATE_CURSOR, 0);

return i;
}

as well as several other similar places in Xorg's code. Question is: how big 
effort would it be to actually fix this?
Should this be reported/consulted with the upstream directly maybe?

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: xserver-xorg-core 2:1.20.7-2ubuntu2
ProcVersionSignature: Ubuntu 5.4.0-21.25-generic 5.4.27
Uname: Linux 5.4.0-21-generic x86_64
ApportVersion: 2.20.11-0ubuntu21
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Fri Apr  3 12:45:07 2020
DistUpgraded: Fresh install
DistroCodename: focal
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, including running git bisection searches
GraphicsCard:
 Intel Corporation 4th Gen Core Processor Integrated Graphics Controller 
[8086:0416] (rev 06) (prog-if 00 [VGA controller])
   Subsystem: Dell 4th Gen Core Processor Integrated Graphics Controller 
[1028:060d]
   Subsystem: Dell GK107GLM [Quadro K1100M] [1028:060d]
InstallationDate: Installed on 2020-03-30 (4 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Alpha amd64 (20200329)
MachineType: Dell Inc. Dell Precision M3800
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-21-generic 
root=UUID=1b7a03b4-95ff-4d1b-9897-848a0dc6f8b9 ro quiet splash vt.handoff=7
SourcePackage: xorg-server
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/25/2018
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A12
dmi.board.name: Dell Precision M3800
dmi.board.vendor: Dell Inc.
dmi.board.version: A12
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: Not Specified
dmi.modalias: 
dmi:bvnDellInc.:bvrA12:bd05/25/2018:svnDellInc.:pnDellPrecisionM3800:pvrA12:rvnDellInc.:rnDellPrecisionM3800:rvrA12:cvnDellInc.:ct8:cvrNotSpecified:
dmi.product.name: Dell Precision M3800
dmi.product.sku: Dell Precision M3800
dmi.product.version: A12
dmi.sys.vendor: Dell Inc.
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.100-4
version.libgl1-mesa-dri: libgl1-mesa-dri 20.0.2-1ubuntu1
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.20.7-2ubuntu2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 
2:2.99.917+git20190815-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1

** Affects: xorg-server (Ubuntu)
 Importance: Undecided
 Status: New


** Tags: amd64 apport-bug focal ubuntu

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Title:
  fallback to SW cursor on GPU hotplug

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[Ubuntu-x-swat] [Bug 1870512] [NEW] forced software cursor with PageFlip enabled triggers artifacts on screen

2020-04-03 Thread Aleksander Miera
Public bug reported:

The following Xorg configuration triggers faulty behaviour, like
blinking cursor, corrupt graphics around it etc.:

  1 Section "Device"
  2   Identifier "graphicsdriver"
  3   Driver  "modesetting"
  4   Option "SWCursor" "true"
  5   #Option "PageFlip" "off"
  6   #Option "AccelMethod" "none"
  7 EndSection

Either switching SWCursor to false or uncommenting line 5 or 6 makes the issue 
disappear.
Disabling accelleration is naturally the least recommended way of resolving the 
issue.
As far as I've analyzed Xorg's source code shipped with 20.04, I can see that 
https://gitlab.freedesktop.org/xorg/xserver/commit/0aaac8d783e78c040a70a55ba8d67809abd7e625
which should probably automatically handle the issue (haven't tried to build 
with those changes yet) is not included. If it ever should be in (as it looks 
like a workaround only), reamains an open question.

I am not entirely sure which package to attach this bug to, Xorg seems
the most viable at the moment. My reason for the uncertainty originates
from the fact, that I have also tested other distros, e.g. SuSE
tumbleweed (build from this week, exact versions to be added if needed)
with KDE plasma, which happens to reproduce the bug only with OpenGL set
as compositor's backend; XRender operates perfectly fine there; hence it
is a bit unclear to me which compoment is the "owning interface" and
which one is actually buggy, be it Xorg, mesa or compositor; please
reassign the bug accordingly if needed.

My plan for the nearest future is to verify whether the aforementioned
change actually circumvents the issue. If anything else should be looked
at to fix the problem, I am open for suggestions.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: xserver-xorg-core 2:1.20.7-2ubuntu2
ProcVersionSignature: Ubuntu 5.4.0-21.25-generic 5.4.27
Uname: Linux 5.4.0-21-generic x86_64
ApportVersion: 2.20.11-0ubuntu21
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Fri Apr  3 09:41:57 2020
DistUpgraded: Fresh install
DistroCodename: focal
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, including running git bisection searches
GraphicsCard:
 Intel Corporation 4th Gen Core Processor Integrated Graphics Controller 
[8086:0416] (rev 06) (prog-if 00 [VGA controller])
   Subsystem: Dell 4th Gen Core Processor Integrated Graphics Controller 
[1028:060d]
   Subsystem: Dell GK107GLM [Quadro K1100M] [1028:060d]
InstallationDate: Installed on 2020-03-30 (4 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Alpha amd64 (20200329)
MachineType: Dell Inc. Dell Precision M3800
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-21-generic 
root=UUID=1b7a03b4-95ff-4d1b-9897-848a0dc6f8b9 ro quiet splash vt.handoff=7
SourcePackage: xorg-server
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/25/2018
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A12
dmi.board.name: Dell Precision M3800
dmi.board.vendor: Dell Inc.
dmi.board.version: A12
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: Not Specified
dmi.modalias: 
dmi:bvnDellInc.:bvrA12:bd05/25/2018:svnDellInc.:pnDellPrecisionM3800:pvrA12:rvnDellInc.:rnDellPrecisionM3800:rvrA12:cvnDellInc.:ct8:cvrNotSpecified:
dmi.product.name: Dell Precision M3800
dmi.product.sku: Dell Precision M3800
dmi.product.version: A12
dmi.sys.vendor: Dell Inc.
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.100-4
version.libgl1-mesa-dri: libgl1-mesa-dri 20.0.2-1ubuntu1
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.20.7-2ubuntu2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 
2:2.99.917+git20190815-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1

** Affects: xorg-server (Ubuntu)
 Importance: Undecided
 Status: New


** Tags: amd64 apport-bug focal ubuntu

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You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to xorg-server in Ubuntu.
https://bugs.launchpad.net/bugs/1870512

Title:
  forced software cursor with PageFlip enabled triggers artifacts on
  screen

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1870512/+subscriptions

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