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Chrome OSは更新されません。

tag-icon • tag-icon upgrade software-updates chrome-os
Chrome OSは更新されません。

エラーコードは次のとおりです。これが何を意味するのか、何をすべきかはよくわかりません。 ChromeOSノートパソコンを使用しています。

---- START OF UPGRADE ----
+ grep -q VERSION_CODENAME=stretch /etc/os-release
+ export DEBIAN_FRONTEND=noninteractive
+ APT_KEY_DONT_WARN_ON_DANGEROUS_USAGE=1 apt-key adv --batch --refresh-keys --keyserver keyserver.ubuntu.com EB4C1BFD4F042F6DDDCCEC917721F63BD38B4796
Executing: /tmp/apt-key-gpghome.vYTyKq8BN7/gpg.1.sh --batch --refresh-keys --keyserver keyserver.ubuntu.com EB4C1BFD4F042F6DDDCCEC917721F63BD38B4796
gpg: refreshing 1 key from hkp://keyserver.ubuntu.com
gpg: key 7721F63BD38B4796: "Google Inc. (Linux Packages Signing Authority) <[email protected]>" not changed
gpg: Total number processed: 1
gpg:              unchanged: 1
+ do_upgrade
+ APT_OPTIONS=-o Dpkg::Options::=--force-confdef
   -o Dpkg::Options::=--force-confold
+ dpkg --configure -a
+ apt-get -o Dpkg::Options::=--force-confdef -o Dpkg::Options::=--force-confold update -y --allow-releaseinfo-change
E: Conflicting values set for option Signed-By regarding source https://updates.signal.org/desktop/apt/ xenial: /usr/share/keyrings/signal-desktop-keyring.gpg != 
E: The list of sources could not be read.
---- START OF UPGRADE ----
+ grep -q VERSION_CODENAME=stretch /etc/os-release
+ export DEBIAN_FRONTEND=noninteractive
+ APT_KEY_DONT_WARN_ON_DANGEROUS_USAGE=1 apt-key adv --batch --refresh-keys --keyserver keyserver.ubuntu.com EB4C1BFD4F042F6DDDCCEC917721F63BD38B4796
Executing: /tmp/apt-key-gpghome.jwXFtjvLZ0/gpg.1.sh --batch --refresh-keys --keyserver keyserver.ubuntu.com EB4C1BFD4F042F6DDDCCEC917721F63BD38B4796
gpg: refreshing 1 key from hkp://keyserver.ubuntu.com
gpg: key 7721F63BD38B4796: "Google Inc. (Linux Packages Signing Authority) <[email protected]>" not changed
gpg: Total number processed: 1
gpg:              unchanged: 1
+ do_upgrade
+ APT_OPTIONS=-o Dpkg::Options::=--force-confdef
   -o Dpkg::Options::=--force-confold
+ dpkg --configure -a
+ apt-get -o Dpkg::Options::=--force-confdef -o Dpkg::Options::=--force-confold update -y --allow-releaseinfo-change
E: Conflicting values set for option Signed-By regarding source https://updates.signal.org/desktop/apt/ xenial: /usr/share/keyrings/signal-desktop-keyring.gpg != 
E: The list of sources could not be read.
---- START OF UPGRADE ----
+ grep -q VERSION_CODENAME=stretch /etc/os-release
+ export DEBIAN_FRONTEND=noninteractive
+ APT_KEY_DONT_WARN_ON_DANGEROUS_USAGE=1 apt-key adv --batch --refresh-keys --keyserver keyserver.ubuntu.com EB4C1BFD4F042F6DDDCCEC917721F63BD38B4796
Executing: /tmp/apt-key-gpghome.HyYSLmZdq6/gpg.1.sh --batch --refresh-keys --keyserver keyserver.ubuntu.com EB4C1BFD4F042F6DDDCCEC917721F63BD38B4796
gpg: refreshing 1 key from hkp://keyserver.ubuntu.com
gpg: key 7721F63BD38B4796: "Google Inc. (Linux Packages Signing Authority) <[email protected]>" not changed
gpg: Total number processed: 1
gpg:              unchanged: 1
+ do_upgrade
+ APT_OPTIONS=-o Dpkg::Options::=--force-confdef
   -o Dpkg::Options::=--force-confold
+ dpkg --configure -a
+ apt-get -o Dpkg::Options::=--force-confdef -o Dpkg::Options::=--force-confold update -y --allow-releaseinfo-change
E: Conflicting values set for option Signed-By regarding source https://updates.signal.org/desktop/apt/ xenial: /usr/share/keyrings/signal-desktop-keyring.gpg != 
E: The list of sources could not be read.

ベストアンサー1

努力する：

sudo rm /etc/apt/sources.list.d/signal-xenial.list

参照番号ここ。

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