hidpi-daemon IndexError: list index out of range

[maxilee]

xarndr:

Screen 0: minimum 320 x 200, current 2560 x 1600, maximum 16384 x 16384
eDP-1 connected primary 2560x1600+0+0 left (normal left inverted right x axis y axis) 113mm x 181mm
   1600x2560     55.92*+
HDMI-1 disconnected (normal left inverted right x axis y axis)
DP-1 disconnected (normal left inverted right x axis y axis)
HDMI-2 disconnected (normal left inverted right x axis y axis)
DP-2 disconnected (normal left inverted right x axis y axis)
HDMI-3 disconnected (normal left inverted right x axis y axis)

~/.config/monitors.xml:

<monitors version="2">
  <configuration>
    <logicalmonitor>
      <x>0</x>
      <y>0</y>
      <scale>2</scale>
      <primary>yes</primary>
      <monitor>
        <monitorspec>
          <connector>eDP-1</connector>
          <vendor>MS_</vendor>
          <product>BW8</product>
          <serial>0x00000001</serial>
        </monitorspec>
        <mode>
          <width>2560</width>
          <height>1600</height>
          <rate>55.920200347900391</rate>
        </mode>
      </monitor>
    </logicalmonitor>
  </configuration>
</monitors>

Distribution
/etc/os-release
NAME="Pop!_OS"
VERSION="22.04 LTS"
ID=pop
ID_LIKE="ubuntu debian"
PRETTY_NAME="Pop!_OS 22.04 LTS"
VERSION_ID="22.04"
HOME_URL="https://pop.system76.com"
SUPPORT_URL="https://support.system76.com"
BUG_REPORT_URL="https://github.com/pop-os/pop/issues"
PRIVACY_POLICY_URL="https://system76.com/privacy"
VERSION_CODENAME=jammy
UBUNTU_CODENAME=jammy
LOGO=distributor-logo-pop-os

Issue/Bug Description:
when I login in GDM system is laggy for 2 minutes due errors from hidpi-daemon.desktop,
after that time system is working correctly.

in journal I've got logs :

Oct 01 10:10:01 hostname /usr/libexec/gdm-x-session[20545]: (WW) EDID timing clock 320.00 exceeds claimed max 165MHz, fixing
Oct 01 10:10:01 hostname /usr/libexec/gdm-x-session[20545]: (II) modeset(0): EDID vendor "MS_", prod id 36865
Oct 01 10:10:01 hostname /usr/libexec/gdm-x-session[20545]: (II) modeset(0): Using hsync ranges from config file
Oct 01 10:10:01 hostname /usr/libexec/gdm-x-session[20545]: (II) modeset(0): Using vrefresh ranges from config file
Oct 01 10:10:01 hostname /usr/libexec/gdm-x-session[20545]: (II) modeset(0): Printing DDC gathered Modelines:
Oct 01 10:10:01 hostname /usr/libexec/gdm-x-session[20545]: (II) modeset(0): Modeline "1600x2560"x0.0  320.00  1600 1990 1998 2218  2560 2568 2572 2580 -hsync -vsync (144.3 kHz eP)
Oct 01 10:10:02 hostname hidpi-daemon.desktop[20966]: 2022-10-01 10:10:02,287  ERROR  Error calling _run_hidpi_autoscaling(None):
Oct 01 10:10:02 hostname hidpi-daemon.desktop[20966]: Traceback (most recent call last):
Oct 01 10:10:02 hostname hidpi-daemon.desktop[20966]:   File "/usr/lib/python3/dist-packages/hidpidaemon/hidpidaemon2.py", line 1620, in run_hidpi_autoscaling
Oct 01 10:10:02 hostname hidpi-daemon.desktop[20966]:     return _run_hidpi_autoscaling(model)
Oct 01 10:10:02 hostname hidpi-daemon.desktop[20966]:   File "/usr/lib/python3/dist-packages/hidpidaemon/hidpidaemon2.py", line 1613, in _run_hidpi_autoscaling
Oct 01 10:10:02 hostname hidpi-daemon.desktop[20966]:     hidpi = HiDPIAutoscaling(model)
Oct 01 10:10:02 hostname hidpi-daemon.desktop[20966]:   File "/usr/lib/python3/dist-packages/hidpidaemon/hidpidaemon2.py", line 170, in __init__
Oct 01 10:10:02 hostname hidpi-daemon.desktop[20966]:     self.init_xlib()
Oct 01 10:10:02 hostname hidpi-daemon.desktop[20966]:   File "/usr/lib/python3/dist-packages/hidpidaemon/hidpidaemon2.py", line 192, in init_xlib
Oct 01 10:10:02 hostname hidpi-daemon.desktop[20966]:     self.displays_xml = self.get_displays_xml()
Oct 01 10:10:02 hostname hidpi-daemon.desktop[20966]:   File "/usr/lib/python3/dist-packages/hidpidaemon/hidpidaemon2.py", line 259, in get_displays_xml
Oct 01 10:10:02 hostname hidpi-daemon.desktop[20966]:     edid_vendor = table[char1-1] + table[char2-1] + table[char3-1]
Oct 01 10:10:02 hostname hidpi-daemon.desktop[20966]: IndexError: list index out of range

Other Notes:
I'm using onemix 3 UMPC - in that UMPC display is from tablets and it is mounted horizontaly: i've tunning few settings to make it work in landscape position.

here is output from edid-decode :

edid-decode /sys/class/drm/card0-eDP-1/edid 
edid-decode (hex):

00 ff ff ff ff ff ff 00 36 7f 01 90 01 00 00 00
00 0c 01 03 80 09 0f 78 2f 00 00 a0 57 49 9b 26
10 48 4f 00 00 00 01 01 01 01 01 01 01 01 01 01
01 01 01 01 01 01 00 7d 40 6a 62 00 14 a0 86 08
84 40 71 b5 00 00 00 18 00 00 00 fc 00 42 57 38
0a 20 20 20 20 20 20 20 20 20 00 00 00 fd 00 3c
3c 7d 7d 10 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 75

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

Block 0, Base EDID:
  EDID Structure Version & Revision: 1.3
  Vendor & Product Identification:
    Manufacturer: MS_
    Model: 36865
    Serial Number: 1
    Made in: 2002
  Basic Display Parameters & Features:
    Digital display
    Maximum image size: 9 cm x 15 cm
    Gamma: 2.20
    DPMS levels: Off
    RGB color display
    Default (sRGB) color space is primary color space
    First detailed timing is the preferred timing
    Supports GTF timings within operating range
  Color Characteristics:
    Red  : 0.6250, 0.3398
    Green: 0.2851, 0.6054
    Blue : 0.1484, 0.0625
    White: 0.2812, 0.3085
  Established Timings I & II: none
  Standard Timings: none
  Detailed Timing Descriptors:
    DTD 1:  1600x2560   55.920 Hz   5:8   144.274 kHz 320.000 MHz (113 mm x 181 mm)
                 Hfront  390 Hsync   8 Hback 220 Hpol N
                 Vfront    8 Vsync   4 Vback   8 Vpol N
    Display Product Name: 'BW8'
  Display Range Limits:
    Monitor ranges (GTF): 60-60 Hz V, 125-125 kHz H, max dotclock 160 MHz
    Empty Descriptor
Checksum: 0x75

my display adapter :

        *-display
             description: VGA compatible controller
             product: UHD Graphics 615
             vendor: Intel Corporation
             physical id: 2
             bus info: pci@0000:00:02.0
             logical name: /dev/fb0
             version: 02
             width: 64 bits
             clock: 33MHz
             capabilities: vga_controller bus_master cap_list rom fb
             configuration: depth=32 driver=i915 latency=0 resolution=1600,2560
             resources: irq:134 memory:de000000-deffffff memory:c0000000-cfffffff ioport:f000(size=64) memory:c0000-dffff

[maxilee]

hi.
i'm not skilled programer but I've made ugly hack.

in that script table in line 259 contains only letters - exact 27 chars ( A..Z ).

my Manufacturer: MS_ - contains "_" which cause that variable char3 in line edid_vendor = table[char1-1] + table[char2-1] + table[char3-1] equals 31 which is indeed ut of range in "table".

i've added code :

                    table = ['A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', '_']
                    if char1 > len(table):
                        char1 = 27
                    if char2 > len(table):
                        char2 = 27
                    if char3 > len(table):
                        char3 = 27
                    edid_vendor = table[char1-1] + table[char2-1] + table[char3-1]

now there is no more error in logs , but I've no idea is this change will break something else