[focal] Screen flickering in Xorg on i7-1165G7

Thanks for the bug report. Please try adding the following kernel parameter:

  i915.enable_psr=0

to /etc/default/grub under GRUB_CMDLINE_LINUX_DEFAULT, then run:

  sudo update-grub

and reboot. Finally check to see that it's being used:

  cat /proc/cmdline

I already did it some time ago, with no result.
I did it again now, but cat /proc/cmdline report the same result as before:

camp@camp-medion:~$ cat /proc/cmdline
BOOT_IMAGE=/boot/vmlinuz-5.13.0-41-generic
root=UUID=cbfc0023-baf3-4a11-b0aa-6dadbd0f60f7 ro quiet splash
pci=noaer vt.handoff=7

On 16/06/2023, Daniel van Vugt <email address hidden> wrote:
> Thanks for the bug report. Please try adding the following kernel
> parameter:
>
> i915.enable_psr=0
>
> to /etc/default/grub under GRUB_CMDLINE_LINUX_DEFAULT, then run:
>
> sudo update-grub
>
> and reboot. Finally check to see that it's being used:
>
> cat /proc/cmdline
>
> ** Package changed: xorg (Ubuntu) => linux-hwe-5.13 (Ubuntu)
>
> ** Changed in: linux-hwe-5.13 (Ubuntu)
> Status: New => Incomplete
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/2023927
>
> Title:
> Screen flickering whe update images
>
> Status in linux-hwe-5.13 package in Ubuntu:
> Incomplete
>
> Bug description:
> Often, when there are small changes in image displayed, an horizontal
> flickering is observed. This happen for example on a mouse right button
> menu, or when a hyperlink description appears on the screen bottom when
> mouse pointer cross some field on a webpage, also when favorites menu
> appear.
> The flickering usually disappear in a few moments, sometimes (usually when
> a few pixels are updating) it can last for seconds.
> This flickering is caused by a late updating of some horizontal lines, so
> for awhile a few lines of previous image coexist with a majority of new
> ones
>
> ProblemType: Bug
> DistroRelease: Ubuntu 20.04
> Package: xorg 1:7.7+19ubuntu14
> ProcVersionSignature: Ubuntu 5.13.0-41.46~20.04.1-generic 5.13.19
> Uname: Linux 5.13.0-41-generic x86_64
> ApportVersion: 2.20.11-0ubuntu27.23
> Architecture: amd64
> BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
> CasperMD5CheckResult: skip
> CompositorRunning: None
> CurrentDesktop: ubuntu:GNOME
> Date: Wed Jun 14 22:44:12 2023
> DistUpgraded: Fresh install
> DistroCodename: focal
> DistroVariant: ubuntu
> DkmsStatus:
> virtualbox, 6.1.32, 5.13.0-40-generic, x86_64: installed
> virtualbox, 6.1.32, 5.13.0-41-generic, x86_64: installed
> virtualbox, 6.1.32, 5.4.0-126-generic, x86_64: installed
> ExtraDebuggingInterest: Yes, including running git bisection searches
> GraphicsCard:
> Intel Corporation Device [8086:9a49] (rev 01) (prog-if 00 [VGA
> controller])
> Subsystem: Device [1e39:a025]
> InstallationDate: Installed on 2022-01-01 (529 days ago)
> InstallationMedia: Ubuntu 20.04.3 LTS "Focal Fossa" - Release amd64
> (20210819)
> Lsusb: Error: command ['lsusb'] failed with exit code 127: lsusb: symbol
> lookup error: lsusb: undefined symbol: libusb_error_name
> Lsusb-t: Error: command ['lsusb', '-t'] failed with exit code 127: lsusb:
> symbol lookup error: lsusb: undefined symbol: libusb_error_name
> Lsusb-v: Error: command ['lsusb', '-v'] failed with exit code 127: lsusb:
> symbol lookup error: lsusb: undefined symbol: libusb_error_name
> MachineType: MED...

Indeed i915.enable_psr=0 is not currently applied. Please follow all the instructions in comment #2.

I did it again, now the result is different, but the bug didn't change

camp@camp-medion:~$ cat /proc/cmdline
BOOT_IMAGE=/boot/vmlinuz-5.13.0-41-generic
root=UUID=cbfc0023-baf3-4a11-b0aa-6dadbd0f60f7 ro i915.enable_psr=0

On 16/06/2023, Daniel van Vugt <email address hidden> wrote:
> Indeed i915.enable_psr=0 is not currently applied. Please follow all the
> instructions in comment #2.
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/2023927
>
> Title:
> Screen flickering whe update images
>
> Status in linux-hwe-5.13 package in Ubuntu:
> Incomplete
>
> Bug description:
> Often, when there are small changes in image displayed, an horizontal
> flickering is observed. This happen for example on a mouse right button
> menu, or when a hyperlink description appears on the screen bottom when
> mouse pointer cross some field on a webpage, also when favorites menu
> appear.
> The flickering usually disappear in a few moments, sometimes (usually when
> a few pixels are updating) it can last for seconds.
> This flickering is caused by a late updating of some horizontal lines, so
> for awhile a few lines of previous image coexist with a majority of new
> ones
>
> ProblemType: Bug
> DistroRelease: Ubuntu 20.04
> Package: xorg 1:7.7+19ubuntu14
> ProcVersionSignature: Ubuntu 5.13.0-41.46~20.04.1-generic 5.13.19
> Uname: Linux 5.13.0-41-generic x86_64
> ApportVersion: 2.20.11-0ubuntu27.23
> Architecture: amd64
> BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
> CasperMD5CheckResult: skip
> CompositorRunning: None
> CurrentDesktop: ubuntu:GNOME
> Date: Wed Jun 14 22:44:12 2023
> DistUpgraded: Fresh install
> DistroCodename: focal
> DistroVariant: ubuntu
> DkmsStatus:
> virtualbox, 6.1.32, 5.13.0-40-generic, x86_64: installed
> virtualbox, 6.1.32, 5.13.0-41-generic, x86_64: installed
> virtualbox, 6.1.32, 5.4.0-126-generic, x86_64: installed
> ExtraDebuggingInterest: Yes, including running git bisection searches
> GraphicsCard:
> Intel Corporation Device [8086:9a49] (rev 01) (prog-if 00 [VGA
> controller])
> Subsystem: Device [1e39:a025]
> InstallationDate: Installed on 2022-01-01 (529 days ago)
> InstallationMedia: Ubuntu 20.04.3 LTS "Focal Fossa" - Release amd64
> (20210819)
> Lsusb: Error: command ['lsusb'] failed with exit code 127: lsusb: symbol
> lookup error: lsusb: undefined symbol: libusb_error_name
> Lsusb-t: Error: command ['lsusb', '-t'] failed with exit code 127: lsusb:
> symbol lookup error: lsusb: undefined symbol: libusb_error_name
> Lsusb-v: Error: command ['lsusb', '-v'] failed with exit code 127: lsusb:
> symbol lookup error: lsusb: undefined symbol: libusb_error_name
> MachineType: MEDION S15449
> ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.13.0-41-generic
> root=UUID=cbfc0023-baf3-4a11-b0aa-6dadbd0f60f7 ro quiet splash pci=noaer
> vt.handoff=7
> SourcePackage: xorg
> Symptom: display
> UpgradeStatus: No upgrade log present (probably fresh install)
> dmi.bios.date: 04/09/2021
> dmi.bios.release: 5.19
> dmi.bios.vendor: American Megatrends Internationa...

In that case it sounds like a driver bug.

Firstly please check you're not using the deprecated 'intel' Xorg driver. It should be the 'modesetting' driver, although the attached logs suggest you're already using that.

Secondly try live booting a newer Ubuntu release and tell us if it has the same problem: https://ubuntu.com/download/desktop

This is the result of driver check:

camp@camp-medion:~$ glxinfo -B
name of display: :0
display: :0 screen: 0
direct rendering: Yes
Extended renderer info (GLX_MESA_query_renderer):
    Vendor: Mesa/X.org (0xffffffff)
    Device: llvmpipe (LLVM 12.0.0, 256 bits) (0xffffffff)
    Version: 21.2.6
    Accelerated: no
    Video memory: 15746MB
    Unified memory: no
    Preferred profile: core (0x1)
    Max core profile version: 4.5
    Max compat profile version: 3.1
    Max GLES1 profile version: 1.1
    Max GLES[23] profile version: 3.2
OpenGL vendor string: Mesa/X.org
OpenGL renderer string: llvmpipe (LLVM 12.0.0, 256 bits)
OpenGL core profile version string: 4.5 (Core Profile) Mesa 21.2.6
OpenGL core profile shading language version string: 4.50
OpenGL core profile context flags: (none)
OpenGL core profile profile mask: core profile

OpenGL version string: 3.1 Mesa 21.2.6
OpenGL shading language version string: 1.40
OpenGL context flags: (none)

OpenGL ES profile version string: OpenGL ES 3.2 Mesa 21.2.6
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.20

On 16/06/2023, Daniel van Vugt <email address hidden> wrote:
> In that case it sounds like a driver bug.
>
> Firstly please check you're not using the deprecated 'intel' Xorg
> driver. It should be the 'modesetting' driver, although the attached
> logs suggest you're already using that.
>
> Secondly try live booting a newer Ubuntu release and tell us if it has
> the same problem: https://ubuntu.com/download/desktop
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/2023927
>
> Title:
> Screen flickering whe update images
>
> Status in linux-hwe-5.13 package in Ubuntu:
> Incomplete
>
> Bug description:
> Often, when there are small changes in image displayed, an horizontal
> flickering is observed. This happen for example on a mouse right button
> menu, or when a hyperlink description appears on the screen bottom when
> mouse pointer cross some field on a webpage, also when favorites menu
> appear.
> The flickering usually disappear in a few moments, sometimes (usually when
> a few pixels are updating) it can last for seconds.
> This flickering is caused by a late updating of some horizontal lines, so
> for awhile a few lines of previous image coexist with a majority of new
> ones
>
> ProblemType: Bug
> DistroRelease: Ubuntu 20.04
> Package: xorg 1:7.7+19ubuntu14
> ProcVersionSignature: Ubuntu 5.13.0-41.46~20.04.1-generic 5.13.19
> Uname: Linux 5.13.0-41-generic x86_64
> ApportVersion: 2.20.11-0ubuntu27.23
> Architecture: amd64
> BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
> CasperMD5CheckResult: skip
> CompositorRunning: None
> CurrentDesktop: ubuntu:GNOME
> Date: Wed Jun 14 22:44:12 2023
> DistUpgraded: Fresh install
> DistroCodename: focal
> DistroVariant: ubuntu
> DkmsStatus:
> virtualbox, 6.1.32, 5.13.0-40-generic, x86_64: installed
> virtualbox, 6.1.32, 5.13.0-41-generic, x86_64: installed
> virtualbox, 6.1.32, 5.4.0-126-generic, x86_64: installed
> ExtraDebuggingInterest: Yes, including running git bisectio...

I switched to Wayland and the problem solved, but others arise! i.e.
the favourite menu starts not working

On 16/06/2023, Salvatore Campeggio <email address hidden> wrote:
> This is the result of driver check:
>
> camp@camp-medion:~$ glxinfo -B
> name of display: :0
> display: :0 screen: 0
> direct rendering: Yes
> Extended renderer info (GLX_MESA_query_renderer):
> Vendor: Mesa/X.org (0xffffffff)
> Device: llvmpipe (LLVM 12.0.0, 256 bits) (0xffffffff)
> Version: 21.2.6
> Accelerated: no
> Video memory: 15746MB
> Unified memory: no
> Preferred profile: core (0x1)
> Max core profile version: 4.5
> Max compat profile version: 3.1
> Max GLES1 profile version: 1.1
> Max GLES[23] profile version: 3.2
> OpenGL vendor string: Mesa/X.org
> OpenGL renderer string: llvmpipe (LLVM 12.0.0, 256 bits)
> OpenGL core profile version string: 4.5 (Core Profile) Mesa 21.2.6
> OpenGL core profile shading language version string: 4.50
> OpenGL core profile context flags: (none)
> OpenGL core profile profile mask: core profile
>
> OpenGL version string: 3.1 Mesa 21.2.6
> OpenGL shading language version string: 1.40
> OpenGL context flags: (none)
>
> OpenGL ES profile version string: OpenGL ES 3.2 Mesa 21.2.6
> OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.20
>
>
> On 16/06/2023, Daniel van Vugt <email address hidden> wrote:
>> In that case it sounds like a driver bug.
>>
>> Firstly please check you're not using the deprecated 'intel' Xorg
>> driver. It should be the 'modesetting' driver, although the attached
>> logs suggest you're already using that.
>>
>> Secondly try live booting a newer Ubuntu release and tell us if it has
>> the same problem: https://ubuntu.com/download/desktop
>>
>> --
>> You received this bug notification because you are subscribed to the bug
>> report.
>> https://bugs.launchpad.net/bugs/2023927
>>
>> Title:
>> Screen flickering whe update images
>>
>> Status in linux-hwe-5.13 package in Ubuntu:
>> Incomplete
>>
>> Bug description:
>> Often, when there are small changes in image displayed, an horizontal
>> flickering is observed. This happen for example on a mouse right button
>> menu, or when a hyperlink description appears on the screen bottom when
>> mouse pointer cross some field on a webpage, also when favorites menu
>> appear.
>> The flickering usually disappear in a few moments, sometimes (usually
>> when
>> a few pixels are updating) it can last for seconds.
>> This flickering is caused by a late updating of some horizontal lines,
>> so
>> for awhile a few lines of previous image coexist with a majority of new
>> ones
>>
>> ProblemType: Bug
>> DistroRelease: Ubuntu 20.04
>> Package: xorg 1:7.7+19ubuntu14
>> ProcVersionSignature: Ubuntu 5.13.0-41.46~20.04.1-generic 5.13.19
>> Uname: Linux 5.13.0-41-generic x86_64
>> ApportVersion: 2.20.11-0ubuntu27.23
>> Architecture: amd64
>> BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
>> CasperMD5CheckResult: skip
>> CompositorRunning: None
>> CurrentDesktop: ubuntu:GNOME
>> Date: Wed Jun 14 22:44:12 2023
>> DistUpgraded: Fresh install
>> DistroCodename: ...

Comment #7 shows the wrong driver in use - it's using software rendering on the CPU instead of using the GPU. I cannot figure out why yet, but generally recommend you use long term support release 22.04 instead:

https://ubuntu.com/download/desktop