5.19.0-1007-allwinner: screen buffer not completely displayed

[Heinrich Schuchardt]

I have installed the Kinetic preinstalled image on the Nezha board and upgraded it.

With the 5.19 kernel the HDMI console output uses a larger font. Not all columns and not all lines of the screen buffer are visible. So when reaching the lower end of the HDMI output you start typing in the dark. At least 20 lines of output are invisible. At least 80 columns on the right side are not displayed.

This renders the HDMI console unusable.

$ cat /sys/class/drm/card0-HDMI-A-1/modes
1024x768
800x600
800x600
848x480
640x480

The 1920x1080 mode is not displayed.

The screen is actually running in 1024x768 mode while the screen buffer assumes 1920x1080.

With the 5.17 allwinner kernel the problem did not exist.

ProblemType: Bug
DistroRelease: Ubuntu 22.10
Package: linux-image-5.19.0-1007-allwinner 5.19.0-1007.7
ProcVersionSignature: Ubuntu 5.19.0-1007.7-allwinner 5.19.17
Uname: Linux 5.19.0-1007-allwinner riscv64
ApportVersion: 2.23.1-0ubuntu3
Architecture: riscv64
CasperMD5CheckResult: unknown
Date: Mon Feb 20 14:21:12 2023
ProcCpuinfoMinimal:
 processor : 0
 hart : 0
 isa : rv64imafdc
 mmu : sv39
 uarch : thead,c906
ProcEnviron:
 TERM=vt220
 PATH=(custom, no user)
 LANG=C.UTF-8
 SHELL=/bin/bash
SourcePackage: linux-allwinner
UpgradeStatus: No upgrade log present (probably fresh install)
---
ProblemType: Bug
ApportVersion: 2.23.1-0ubuntu3
Architecture: riscv64
CasperMD5CheckResult: unknown
DistroRelease: Ubuntu 22.10
Package: linux-allwinner 5.19.0.1007.7
PackageArchitecture: riscv64
ProcCpuinfoMinimal:
 processor : 0
 hart : 0
 isa : rv64imafdc
 mmu : sv39
 uarch : thead,c906
ProcEnviron:
 TERM=vt220
 PATH=(custom, no user)
 LANG=C.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 5.19.0-1007.7-allwinner 5.19.17
Tags: kinetic uec-images
Uname: Linux 5.19.0-1007-allwinner riscv64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: N/A
_MarkForUpload: True

[Heinrich Schuchardt (xypron)]

apport information

[Heinrich Schuchardt (xypron)]

$ edid-decode /sys/class/drm/card0-HDMI-A-1/edid
EDID of '/sys/class/drm/card0-HDMI-A-1/edid' was empty.

[Heinrich Schuchardt (xypron)]

$ sudo ./edid-rw 1 | edid-decode
edid-decode (hex):

00 ff ff ff ff ff ff 00 22 70 00 00 00 00 00 00
05 1f 01 03 80 22 13 78 ea da e5 95 5d 59 94 29
24 50 54 bf ef 80 d1 c0 b3 00 a9 40 a9 c0 81 80
81 40 81 00 81 c0 1a 36 80 a0 70 38 1f 40 30 20
25 00 58 c1 10 00 00 1a 00 00 00 ff 00 0a 20 20
20 20 20 20 20 20 20 20 20 20 00 00 00 fd 00 38
4b 1e 51 12 00 0a 20 20 20 20 20 20 00 00 00 fc
00 48 4c 31 36 32 43 50 42 0a 20 20 20 20 01 52

02 03 22 f2 4c 90 1f 05 14 04 13 12 16 03 02 07
01 23 09 07 07 83 01 00 00 65 03 0c 00 10 00 e2
00 4f 8c 0a d0 8a 20 e0 2d 10 10 3e 96 00 58 c1
10 00 00 18 01 1d 80 18 71 1c 16 20 58 2c 25 00
58 c1 10 00 00 9e 02 3a 80 18 71 38 2d 40 58 2c
45 00 58 c1 10 00 00 1e 01 1d 80 d0 72 1c 16 20
10 2c 25 80 58 c1 10 00 00 9e 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 05

----------------

Block 0, Base EDID:
  EDID Structure Version & Revision: 1.3
  Vendor & Product Identification:
    Manufacturer: HSP
    Model: 0
    Made in: week 5 of 2021
  Basic Display Parameters & Features:
    Digital display
    Maximum image size: 34 cm x 19 cm
    Gamma: 2.20
    DPMS levels: Standby Suspend Off
    RGB color display
    First detailed timing is the preferred timing
  Color Characteristics:
    Red : 0.5849, 0.3642
    Green: 0.3496, 0.5800
    Blue : 0.1630, 0.1425
    White: 0.3134, 0.3291
  Established Timings I & II:
    IBM : 720x400 70.081663 Hz 9:5 31.467 kHz 28.320000 MHz
    DMT 0x04: 640x480 59.940476 Hz 4:3 31.469 kHz 25.175000 MHz
    Apple : 640x480 66.666667 Hz 4:3 35.000 kHz 30.240000 MHz
    DMT 0x05: 640x480 72.808802 Hz 4:3 37.861 kHz 31.500000 MHz
    DMT 0x06: 640x480 75.000000 Hz 4:3 37.500 kHz 31.500000 MHz
    DMT 0x08: 800x600 56.250000 Hz 4:3 35.156 kHz 36.000000 MHz
    DMT 0x09: 800x600 60.316541 Hz 4:3 37.879 kHz 40.000000 MHz
    DMT 0x0a: 800x600 72.187572 Hz 4:3 48.077 kHz 50.000000 MHz
    DMT 0x0b: 800x600 75.000000 Hz 4:3 46.875 kHz 49.500000 MHz
    Apple : 832x624 74.551266 Hz 4:3 49.726 kHz 57.284000 MHz
    DMT 0x10: 1024x768 60.003840 Hz 4:3 48.363 kHz 65.000000 MHz
    DMT 0x11: 1024x768 70.069359 Hz 4:3 56.476 kHz 75.000000 MHz
    DMT 0x12: 1024x768 75.028582 Hz 4:3 60.023 kHz 78.750000 MHz
    DMT 0x24: 1280x1024 75.024675 Hz 5:4 79.976 kHz 135.000000 MHz
    Apple : 1152x870 75.061550 Hz 192:145 68.681 kHz 100.000000 MHz
  Standard Timings:
    DMT 0x52: 1920x1080 60.000000 Hz 16:9 67.500 kHz 148.500000 MHz
    DMT 0x3a: 1680x1050 59.954250 Hz 16:10 65.290 kHz 146.250000 MHz
    DMT 0x33: 1600x1200 60.000000 Hz 4:3 75.000 kHz 162.000000 MHz
    DMT 0x53: 1600x900 60.000000 Hz 16:9 60.000 kHz 108.000000 MHz (RB)
    DMT 0x23: 1280x1024 60.019740 Hz 5:4 63.981 kHz 108.000000 MHz
    DMT 0x20: 1280x960 60.000000 Hz 4:3 60.000 kHz 108.000000 MHz
    DMT 0x1c: 1280x800 59.810326 Hz 16:10 49.702 kHz 83.500000 MHz
    DMT 0x55: 1280x720 60.000000 Hz 16:9 45.00...

[Ubuntu QA Website (ubuntuqa)]

This bug has been reported on the Ubuntu ISO testing tracker.

A list of all reports related to this bug can be found here:
https://iso.qa.ubuntu.com/qatracker/reports/bugs/2007857

[Heinrich Schuchardt (xypron)]

The same error still occurs with Linux 5.19.0-1015-allwinner.