** Description changed: - Steps: - 1. Make a usb stick. - 2. Boot from the usb stick in the boot menu. - Actual result: - System hang at the Plymouth before entering the phase 1. + BugLink: https://bugs.launchpad.net/bugs/1791569 - Expected result: - System can be installed smoothly. + This patch is in the 4.18 already, no need to send it to cosmic. + + Due to the context conflict, if we want to apply this patch as it is, we + need to apply a large amount of patches ahead of this patch, it is possible + to introduce some regression. So I made some change in this patch, it is + some differnt from the orignal patch, but they have the same logic, and it + can be applied to bionic kernel. + + [Impact] + We have 2 nvidia graphic cards, and the nouveau driver in the bionic kernel can't + work well with both of these 2 cards, one of the cards hang during the boot + process, we compared the output of lspci and vbios version of these 2 cards, they + are same; and according to nivida's reply, it is possible that they have some + difference on computational units (https://devtalk.nvidia.com/default/topic/1038973/ + linux/2-same-quadro-p1000-cards-but-only-one-can-install-ubuntu-/), and kernel-4.18 + fixed this problem, through bisect, this patch was found. + + [Fix] + backport a upstream patch to fix this problem. without this patch, the number of tpc + (texture process cluster) is hardcoded to be 5 for some nv graphic families, but + in practice, the tpc number of many families is not 5. And the p1000 grphic card belong + to gp107 family, it is 3 intead of 5. + + + [Test Case] + tested this patch with P1000, P2000, P620 and P500 graphic cards, all work well as before. + + [Regression Potential] + Very low, this patch comes from upstream, and I have tested it with many nv graphic + cards, they all worked well as before.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1791569 Title: some nvidia p1000 graphic cards hang during the boot To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1791569/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
