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plz help. ubuntu crashing a lot! accompained by several error while force restart using power button

as flag

so i shifted to ubuntu 20.04LTS from windows 10 few days ago and as of now i am facing huge troubles using ubuntu. the first one being apps crashing a lot and then not opening. like firefox closes itself and after clicking again on icon it pretends as if it is opening again but it doesnt. icon loads on top taskbar but it eventually fades away. the only option i use it force restart using power button but it is not sustainable enough. sometimes before booting after force restart i face an error: "EXT4-FS (SD2): I/O error while....." sometimes all of a sudden everything closes and i face the same error even without booting. and sometimes i face the same error while booting. its troubling me a lot please help me. plus while writing and adding tags to the question i fell like my browser is hell slow and getting freeze for secs. please help

Nmath avatar
ng flag
It sounds like you have multiple issues that don't seem to be related at all. Perhaps there were problems during the installation? If you are very new to using Ubuntu, it will probably be easier to reinstall the OS than to try to find the cause and solution to each of these problems independently. For that, you would need to investigate more detailed information about each problem. Before you reinstall, make sure that your installation media is up-to-date and valid. You should also review any activities you did after the install that might be problematic.
Mayur  avatar
as flag
@Nmath thank you so much for the suggestion but i have already tried reinstalling. i can reinstall it again no issues do you have anything special to mention before i jump into reinstalling the ubuntu? like someways so that i can totally clean up my hard disk and go for a fresh install so that these issues can be avoided in future. thanks again. just to mention i switched to ubuntu when one of my file crashed and was preventing bootup. is there a possibilty that the same file is still causing the issue even when i selected delete all files while installing ubuntu. if yes can we dlt that file?
Jerare avatar
in flag
Maybe the live media / iso file is corrupted. Try to check the checksum / redownload the ubuntu iso and create your live media again. Are you saying that you were already having problems on Windows 10 ? "before switching to ubuntu". If so, your hard drive / SSD may be obsolete and you might need a new one.
Nmath avatar
ng flag
You can format/wipe your hard drive(s) prior to installation. The easiest way to do that is to "Try Ubuntu" when booting from installation media, then use the "Disks" application to format your hard drives. Choose GPT partition scheme. This will erase all files including all data from any other OS in preparation for a new OS installation. Allow the integrity checker to complete during boot to verify it has 100% integrity. As mentioned above, if you have hardware issues, these cannot be fixed with software or a new OS.
guiverc avatar
cn flag
You should provide clear & accurate copy/pastes of messages. *(SD2)* feels incomplete for example; but I'd be checking your hardware health (https://help.ubuntu.com/community/Smartmontools) & checking logs. I'd suggest not using power-button to cut power, but use the SysRq commands to tell the kernel to safely restart/shutdown/etc (grab a phone & search "magic sysrq" & wikipedia page is usually at/near top - it's as good as any). Post unclean shutdown, I'd always boot *live* media & `fsck` (file-system check, GUI tool can be used too) partitions to fix issues caused by unclean shutdown....
guiverc avatar
cn flag
Your tags make little sense, if you're using Ubuntu 20.04 Desktop it's using the GNOME desktop (not Unity, so does that mean you changed your desktops?), how does Ubuntu-One-Windows apply? Ubuntu-ONE is a SSO and how I access this site (ie. login via my Ubuntu ID and not with a Stack Exchange login) so how does it relate?
Mayur  avatar
as flag
@guiverc thanks for your help while installing smartmontools i am facing this :- Err:1 http://in.archive.ubuntu.com/ubuntu focal/main amd64 smartmontools amd64 7.1-1build1 Could not open file /var/cache/apt/archives/partial/smartmontools_7.1-1build1_amd64.deb - open (30: Read-only file system) [IP: 43.255.166.254 80] **and the few last lines** W: Not using locking for read only lock file /var/lib/dpkg/lock-frontend W: Not using locking for read only lock file /var/lib/dpkg/lock E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing? i couldntpaste whole
guiverc avatar
cn flag
A RO (read-only) file-system is a sign of a user issue (ie. you mounted it RO for a reason) or sign of an error (it was RW but errors were detected; if flips to RO to prevent data loss until the user has checked & corrected the issue). You should not be using a system that has flipped RO but running checks using *live* media (ie. everything being run from RAM only so no damage is being done to *fs* until fixed).
Mayur  avatar
as flag
@guiverc thanks for your help. Sorry to say but what exactly do i need to do (politely)?
Mayur  avatar
as flag
@guiverc i am unable to post images since i need so reputation to post them. If you don't mind can i get your social handle or so.
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