While it is possible to downgrade chromium to a version that will run on
a Pentium M processor, it's highly discouraged to run such an old
version that has known security problems.

It's unfortunate that upstream has decided to drop support for these
processors, and unfortunately it's not something that we can easily
undo, because they will make increasing use of SSE3 features.

I'm changing the status to "Won't Fix" accordingly. I suggest switching
to a different browser instead of using an old version of chromium.

** Changed in: chromium-browser (Ubuntu)
       Status: Confirmed => Won't Fix

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https://bugs.launchpad.net/bugs/1921187

Title:
  Illegal instruction at start − sse3 required on i386

Status in chromium-browser package in Ubuntu:
  Won't Fix

Bug description:
  From dpkg.log:
  2021-03-13 17:56:19 upgrade chromium-browser:i386 
87.0.4280.66-0ubuntu0.18.04.1 89.0.4389.82-0ubuntu0.18.04.1
  Won't start at all after this upgrade. Downgrading to 65.0.3325.181-0ubuntu1 
works. Downgrading to 87.0.4280.66-0ubuntu0.18.04.1 is not possible anymore.
  OS: Ubuntu 18.04.5 LTS (Lubuntu)
  cat /proc/cpuinfo 
  processor     : 0
  vendor_id     : GenuineIntel
  cpu family    : 6
  model         : 13
  model name    : Intel(R) Pentium(R) M processor 1.60GHz
  stepping      : 6
  microcode     : 0x18
  cpu MHz               : 600.000
  cache size    : 2048 KB
  physical id   : 0
  siblings      : 1
  core id               : 0
  cpu cores     : 1
  apicid                : 0
  initial apicid        : 0
  fdiv_bug      : no
  f00f_bug      : no
  coma_bug      : no
  fpu           : yes
  fpu_exception : yes
  cpuid level   : 2
  wp            : yes
  flags         : fpu vme de pse tsc msr mce cx8 sep mtrr pge mca cmov clflush 
dts acpi mmx fxsr sse sse2 ss tm pbe bts cpuid est tm2 pti
  bugs          : cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf mds 
swapgs itlb_multihit
  bogomips      : 1199.98
  clflush size  : 64
  cache_alignment       : 64
  address sizes : 36 bits physical, 32 bits virtual
  power management:
  --- 
  ProblemType: Bug
  ApportVersion: 2.20.9-0ubuntu7.23
  Architecture: i386
  CurrentDesktop: LXDE
  DRM.card0-LVDS-1:
   enabled: enabled
   dpms: On
   status: connected
   edid-base64: 
   modes: 1024x768
  DRM.card0-VGA-1:
   enabled: disabled
   dpms: Off
   status: disconnected
   edid-base64: 
   modes:
  Desktop-Session:
   'Lubuntu'
   '/etc/xdg/lubuntu:/etc/xdg/xdg-Lubuntu:/etc/xdg'
   
'/etc/xdg/lubuntu:/usr/share/gdm:/var/lib/menu-xdg:/usr/share/Lubuntu:/usr/local/share:/usr/share:/var/lib/snapd/desktop'
  DetectedPlugins:
   
  DistroRelease: Ubuntu 18.04
  Env:
   'None'
   'None'
  InstalledPlugins:
   
  Load-Avg-1min: 3.84
  Load-Processes-Running-Percent:   0.7%
  Lsusb:
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
   Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
   Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
  MachineType: FUJITSU SIEMENS LIFEBOOK C1110
  Package: chromium-browser 65.0.3325.181-0ubuntu1
  PackageArchitecture: i386
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-140-generic 
root=UUID=29d733a6-7024-41fc-bbe4-2d58c0c1d500 ro splash quiet vt.handoff=1
  ProcVersionSignature: Ubuntu 4.15.0-140.144-generic 4.15.18
  Tags:  bionic
  Uname: Linux 4.15.0-140-generic i686
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  _MarkForUpload: True
  dmi.bios.date: 03/25/2005
  dmi.bios.vendor: Phoenix/FUJITSU
  dmi.bios.version: Version 1.30
  dmi.board.name: FJNB16F
  dmi.board.vendor: FUJITSU
  dmi.chassis.type: 10
  dmi.chassis.vendor: FUJITSU SIEMENS
  dmi.modalias: 
dmi:bvnPhoenix/FUJITSU:bvrVersion1.30:bd03/25/2005:svnFUJITSUSIEMENS:pnLIFEBOOKC1110:pvr:rvnFUJITSU:rnFJNB16F:rvr:cvnFUJITSUSIEMENS:ct10:cvr:
  dmi.product.name: LIFEBOOK C1110
  dmi.sys.vendor: FUJITSU SIEMENS
  modified.conffile..etc.default.chromium-browser: [deleted]

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