Hi, Finally, got a fix to my dual-boot problem!
With further googling, I came across this URL: UEFI Installing - Tips http://ubuntuforums.org/showthread.php?t=2147295 It has lots of tips about all things Ubuntu install/dual-boot under UEFI, secure boot, etc. One section, titled: *Black Screen/ Video Modes* This usually required with AMD or nVidia , suggested kernel parameters: in place of quiet splash , adding acpi_osi=Linux acpi_backlight=vendor And it worked after that! Subsequent to that, I was able to boot the Ubuntu 14.04 64-bit LiveCD from the Win 8.1 laptop, with secureboot disabled, but stayed in UEFI. Installation after that also went without any problem. After that, I was able to boot into either the Ubuntu, or the Win 8.1, and back, no worries, even with cold boot. I did try to re-enable the Secure Boot, but then I wasn't able to boot into Win 8.1 after that. So looks like I will need to stick with secure boot disabled from now on. It would seem this solution is an obscure one - I only just came across it by chance. And don't quite understand what it does either - just that it worked! Thanks Daniel and Douglas for your tips and suggestions. Much appreciated! Also share my experience here so next time others who try can waste less time. :-) Wen On Mon, Sep 8, 2014 at 12:11 AM, Douglas Ray <[email protected]> wrote: > > > On 7/09/14 11:59 PM, Douglas Ray wrote: > > Hi Wen Lin, > > did you try "vbeinfo" at the GRUB prompt? > > ... there's also > http://lists.gnu.org/mailman/listinfo/help-grub > > > cheers > > Douglas > > > > On 6/09/14 5:14 PM, Wen Lin wrote: > >> Hi, > >> > >> I've been trying for weeks to install Ubuntu 14.04 onto my friend's new > >> Toshiba laptop with the new UEFI secure boot built-in. So far, no luck! > >> I can't even boot it up with the Ubuntu Live CD, regardless of > >> SecureBoot enabled or disabled. > >> > >> First, some info and what I had done so far: > >> > >> Laptop: Toshiba Satellite C50D-A > >> (My friend bought from JB Hifi for $480 - not a high-end machine) > >> CPU: AMD E1-1200 APU with Radeon HD Graphic 1.4 GHz 64-bit > >> Memory: 4 GB > >> HD: 500 GB > >> Display adapter: AMD Radeon HD 7310 Graphic > >> OS: Windows 8 (I had since upgraded it to Win 8.1) > >> > >> I had: > >> - Created a Win System Recovery image (using Win 8.1 built-in standard > >> tool) to a USB flash disk. > >> - Also used Win 8.1 built-in tool to shrink the C: drive to 255 GB, > >> leaving me the other half of the disk for my Ubuntu install. > >> > >> I had no problem F2 at startup into the laptop's BIOS to change stuff > like: > >> - Boot sequence > >> - Enable/Disable SecureBoot > >> - Swap between UEFI Boot & CSM Boot (or Legacy mode) > >> > >> I had googled around quite a lot, and had tried several different > >> approaches suggested, to no avail. > >> > >> Most of the forum sites/blogs suggest disable SecureBoot, some said no > >> need - as newer Distro like Ubuntu 14.04 nowadays have no problem > >> booting with SecureBoot on. > >> > >> I tried both approaches, but the Live CD first could only display a > >> text-based version of GRUB 2 boot menu, with "Try Ubuntu" & "Install > >> Ubuntu" among the menu options (rather than the Ubuntu's usual graphical > >> one). Then when I selected either the "Try" or "Install" options, it > >> went into a total blank screen, and a moment later, everything stop - I > >> tried waiting for it, sometimes hours, but it never come back! > >> > >> To try to see some messages, I used 'e' in the Grub menu to get into an > >> editing mode: > >> set gfxpayload=keep > >> linux /casper/vmlinuz.efi file=/... boot=casper quiet splash > -- > >> initrd /casper/initrd.lz > >> > >> To edit the kernel boot up parameters - generally involved replacing the > >> "quiet splash" with parameters like "nomodeset", "vga=radeon", > >> "vga=792", etc - all to no avail. But this time I could see some boot > >> up messages splashing out, and then stopped at certain point: > >> E.g. > >> - [drm] Initialized radeon 1.34.0 ... > >> - ahci 0000:00:11:0: flags: 64bit ncq ... > >> - r8169 Gigabit Ethernet driver ... > >> - fb: conflicting fb hw usage radeondrmfb vs EFI VGA - removing generic > >> driver > >> - ACPI: Video Device [VGA] (multi-head: yes rom: no post: no) > >> > >> In general, it would seem the different boot parameters could only vary > >> in at most several boot steps, but none of them managed to go all the > >> way to successfully boot into Ubuntu Live. > >> > >> I had also tried other Distros: Ubuntu 13.10 64-bit & Linux Mint 15 > >> Cinnamon 64-bit - no different. I even tried an Ubuntu 12.04 32-bit CD > >> - but it boot straight into the Windows 8.1 instead. > >> > >> Another thing to point out: I had also tried the CSM Boot option (in > >> place of the default UEFI). When in this mode, the whole "SecureBoot" > >> feature disappeared, and I managed to boot into Ubuntu 14.04 Live CD, > >> all the local programs, WiFi, Internet, the lots, all worked as normal! > >> I had not tried installing Ubuntu from there. Just as well! As > >> attempt to boot back to Win 8.1 failed - the error message basically was > >> saying that the Win 8.1 is not there anymore! I could only boot back to > >> Win 8.1 normally after I had reverted back to UEFI Boot mode. > >> > >> As you can see, no joy at all! :-( > >> > >> So my question: Is it a UEFI/SecureBoot problem, or an AMD Radeon > >> display adapter problem? If it's a display adapter problem, then why I > >> could boot into Ubuntu when not in UEFI mode? If it's a UEFI problem, > >> then why couldn't I boot into Ubuntu with the SecureBoot disabled (said > >> so by all the related forums & blogs I had visited so far - i.e. > >> secureboot off - no problem)? > >> > >> I was pondering, if all else failed, to just install Ubuntu 14.04 into > >> the partition I had freed up, while in CSM mode. If this worked, then I > >> could persuade my friend to just stick to Ubuntu, and occasionally if > >> wanting to go to Wn 8.1, change back to UEFI before doing so. While > >> this may work (painfully), my friend might one day decide not to go back > >> to Ubuntu, and my efforts would be wasted. Worst still, installing > >> Ubuntu in CSM mode may render the Win 8.1 unbootable, and I don't think > >> my friend want that! > >> > >> Any suggestions, comments, or experience in such dual boot adventure > >> would be welcomed! > >> > >> Thanks in advance. > >> > >> Wen > >> > >> > >> > >> _______________________________________________ > >> luv-main mailing list > >> [email protected] > >> http://lists.luv.asn.au/listinfo/luv-main > >> > > _______________________________________________ > > luv-main mailing list > > [email protected] > > http://lists.luv.asn.au/listinfo/luv-main > > > > > _______________________________________________ > luv-main mailing list > [email protected] > http://lists.luv.asn.au/listinfo/luv-main >
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