[Desire HD General] Teichopsia:
teichopsia@Teichopsia ~ $ adb remount
error: insufficient permissions for device
teichopsia@Teichopsia ~ $ adb kill-server
teichopsia@Teichopsia ~ $ adb start-server
* daemon not running. starting it now on port 5037 *
* daemon started successfully *
teichopsia@Teichopsia ~ $ adb remount
error: insufficient permissions for device
teichopsia@Teichopsia ~ $ adb devices

List of devices attached
????????????	no permissions

teichopsia@Teichopsia ~ $ sudo su
[sudo] password for teichopsia:
Teichopsia teichopsia # adb devices
No command 'adb' found, did you mean:
Command 'cdb' from package 'tinycdb' (main)
Command 'gdb' from package 'gdb' (main)
Command 'dab' from package 'bsdgames' (universe)
Command 'zdb' from package 'zfs-fuse' (universe)
Command 'kdb' from package 'elektra-bin' (universe)
Command 'tdb' from package 'tads2-dev' (multiverse)
Command 'pdb' from package 'python' (main)
Command 'jdb' from package 'openjdk-6-jdk' (main)
Command 'jdb' from package 'openjdk-7-jdk' (universe)
Command 'ab' from package 'apache2-utils' (main)
Command 'ad' from package 'netatalk' (universe)
adb: command not found
Teichopsia teichopsia # ./adb devices
bash: ./adb: No such file or directory
Teichopsia teichopsia # cd home/teichopsia/android-sdk-linux
bash: cd: home/teichopsia/android-sdk-linux: No such file or directory
Teichopsia teichopsia # cd teichopsia
bash: cd: teichopsia: No such file or directory
Teichopsia teichopsia # cd android-sdk-linux
Teichopsia android-sdk-linux # cd platform-tools
Teichopsia platform-tools # adb devices
No command 'adb' found, did you mean:
Command 'cdb' from package 'tinycdb' (main)
Command 'gdb' from package 'gdb' (main)
Command 'dab' from package 'bsdgames' (universe)
Command 'zdb' from package 'zfs-fuse' (universe)
Command 'kdb' from package 'elektra-bin' (universe)
Command 'tdb' from package 'tads2-dev' (multiverse)
Command 'pdb' from package 'python' (main)
Command 'jdb' from package 'openjdk-6-jdk' (main)
Command 'jdb' from package 'openjdk-7-jdk' (universe)
Command 'ab' from package 'apache2-utils' (main)
Command 'ad' from package 'netatalk' (universe)
adb: command not found
Teichopsia platform-tools # adb list
No command 'adb' found, did you mean:
Command 'cdb' from package 'tinycdb' (main)
Command 'gdb' from package 'gdb' (main)
Command 'dab' from package 'bsdgames' (universe)
Command 'zdb' from package 'zfs-fuse' (universe)
Command 'kdb' from package 'elektra-bin' (universe)
Command 'tdb' from package 'tads2-dev' (multiverse)
Command 'pdb' from package 'python' (main)
Command 'jdb' from package 'openjdk-6-jdk' (main)
Command 'jdb' from package 'openjdk-7-jdk' (universe)
Command 'ab' from package 'apache2-utils' (main)
Command 'ad' from package 'netatalk' (universe)
adb: command not found
Teichopsia platform-tools # adb help
No command 'adb' found, did you mean:
Command 'cdb' from package 'tinycdb' (main)
Command 'gdb' from package 'gdb' (main)
Command 'dab' from package 'bsdgames' (universe)
Command 'zdb' from package 'zfs-fuse' (universe)
Command 'kdb' from package 'elektra-bin' (universe)
Command 'tdb' from package 'tads2-dev' (multiverse)
Command 'pdb' from package 'python' (main)
Command 'jdb' from package 'openjdk-6-jdk' (main)
Command 'jdb' from package 'openjdk-7-jdk' (universe)
Command 'ab' from package 'apache2-utils' (main)
Command 'ad' from package 'netatalk' (universe)
adb: command not found
Teichopsia platform-tools # ./adb devices
List of devices attached
????????????	no permissions

Teichopsia platform-tools # ./adb kill-server
Teichopsia platform-tools # ./adb start-server
* daemon not running. starting it now on port 5037 *
* daemon started successfully *
Teichopsia platform-tools # ./adb remount
remount succeeded
Teichopsia platform-tools # ./adb devices
List of devices attached
HT17XT204537	device

Note: that I have been able to use from anywhere without ./ previously. Just by using adb devices

The only thing that has changed is the rom. Running - Blackout ICS Incredible v3.1.0. I believe the rom it did work on was absolution.

Allow me to clarify, as I was setting up adb I was testing with the command ./adb devices with no luck. I then tested with just adb devices which worked. However, with this rom I had to go through that whole process to get it recognized. Hence, no idea.