Public bug reported:
[Impact]
On dual GPU platform, BIOS set frame buffer addr to 64-bit, usually when CSM=NO
setting in BIOS.
When no proper GPU driver loaded, Xorg driver will use the wrong fb addr, then
crash.
[Fix]
Add 64-bit efifb support, make Xorg find the correct GPU fb addr.
If still failed, use the first GPU as default.
[Test]
Tested on Intel and NV dual GPU platform. Works fine.
[Regression Potential]
Upstream fix, low risk.
Verified on ThinkPad P1/P52.
** Affects: hwe-next
Importance: Undecided
Assignee: AaronMa (mapengyu)
Status: New
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Incomplete
** Tags: originate-from-1811752 sutton
** Tags added: originate-from-1811752 sutton
** Changed in: hwe-next
Assignee: (unassigned) => AaronMa (mapengyu)
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1812797
Title:
[SRU] Fix Xorg crash with nomodeset when BIOS enable 64-bit fb addr
Status in HWE Next:
New
Status in linux package in Ubuntu:
Incomplete
Bug description:
[Impact]
On dual GPU platform, BIOS set frame buffer addr to 64-bit, usually when
CSM=NO setting in BIOS.
When no proper GPU driver loaded, Xorg driver will use the wrong fb addr,
then crash.
[Fix]
Add 64-bit efifb support, make Xorg find the correct GPU fb addr.
If still failed, use the first GPU as default.
[Test]
Tested on Intel and NV dual GPU platform. Works fine.
[Regression Potential]
Upstream fix, low risk.
Verified on ThinkPad P1/P52.
To manage notifications about this bug go to:
https://bugs.launchpad.net/hwe-next/+bug/1812797/+subscriptions
--
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help : https://help.launchpad.net/ListHelp
