Hello Dexuan, or anyone else affected, Accepted grub2-signed into xenial-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/grub2-signed/1.66.22 in a few hours, and then in the -proposed repository.
Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users. If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested and change the tag from verification-needed-xenial to verification-done-xenial. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-xenial. In either case, without details of your testing we will not be able to proceed. Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping! N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days. ** Also affects: grub2-signed (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of नेपाली भाषा समायोजकहरुको समूह, which is subscribed to Xenial. Matching subscriptions: Ubuntu 16.04 Bugs https://bugs.launchpad.net/bugs/1826453 Title: Grub2 Booting in blind mode due to "invalid video mode specification `text'" Status in grub2 package in Ubuntu: Fix Released Status in grub2-signed package in Ubuntu: New Status in grub2 source package in Trusty: New Status in grub2-signed source package in Trusty: New Status in grub2 source package in Xenial: Fix Committed Status in grub2-signed source package in Xenial: New Bug description: [Impact] UEFI users booting VMs on Hyper-V [Test case] 1) Install Ubuntu 16.04 in a Gen2 VM on Hyper-V (Windows) 2) After install; edit /etc/default/grub to add: GRUB_GFXPAYLOAD_LINUX="text" 3) Run 'sudo update-grub' 4) Reboot Verify whether the system writes an error/warning on console during boot (this shows up and disappears quickly, one must watch the console attentively): error: invalid video mode specification `text'. Booting in blind mode [Regression potential] There is minimal risk of regression; this is a patch that has been succesfully used in other releases to address the same issue (see bug 1711452). It only affects graphical payload selection in grub to avoid a value that is clearly invalid, thus skipping the error value and falling back to the default text-mode. Care should be taking while testing to identify any possible issues with displaying the grub menu or outputting information from the kernel at console as the system boots (if applicable). --- In a Ubuntu 16.04.6 VM, which runs as a Gen2 VM on Hyper-V, I add GRUB_GFXPAYLOAD_LINUX="text" into /etc/default/grub and run update- grub; next, grub2 prints the below error: error: invalid video mode specification `text'. Booting in blind mode This means grub2 passes a zero value for the "lfb_base" to Linux kernel, which then fails to reserve the framebuffer MMIO range in drivers/hv/vmbus_drv.c: vmbus_reserve_fb(); as a result, when we pass through a PCIe device to the VM, the PCIe device may get a PCI MMIO BAR in the FB MMIO range, causing a conflict, and the PCIe device can not work in the VM. The issue can not reproduce with Ubuntu 18.04. It turns out the grub2 in Ubuntu 18.04 has the below fix: video: skip 'text' gfxpayload if not supported, to fallback to default (https://git.launchpad.net/~ubuntu-core-dev/grub/+git/ubuntu/commit/?id=38d9e2f862a96a039ae8ca8b87b8615d154ceda4). I'm asking the patch author (Mathieu Trudel-Lapierre) to submit the patch to the upstream grub and this is the upstream bug link: https://savannah.gnu.org/bugs/?56217 . Here this launchpad bug is for Ubuntu 16.04 and 14.04. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1826453/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~group.of.nepali.translators Post to : [email protected] Unsubscribe : https://launchpad.net/~group.of.nepali.translators More help : https://help.launchpad.net/ListHelp
