i915 stop working after linux 4.2.0-21-generic
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Expired
|
High
|
Unassigned | ||
Wily |
Expired
|
High
|
Unassigned |
Bug Description
Hello,
After updating the linux kernel of my Ubuntu 15.10 from 4.2.0-21 to 4.2.0.22
I was unable to get to XFCE and slim login manager, I was stuck on a black screen
with nothing displayed (no text/graphics). Same issue with latest 4.2.0.25.
When I go back to 4.2.0-21 everything is working perfectly.
So something is "broken" with i915 module starting 4.2.0.22 and newer.
After some research online, I managed to make it work even with kernel 4.2.25
by doing this vodoo magic magic. It's not clear what made it work ;-P
# /etc/default/grub
GRUB_CMDLINE_
# /etc/modprobe.
options i915 semaphores=1
# /etc/modprobe.
blacklist intel_pstate
reboot
lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 15.10
Release: 15.10
Codename: wily
uname -a
Linux **** 4.2.0-25-generic #30-Ubuntu SMP Mon Jan 18 12:31:50 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
dmidecode -s system-product-name
Macmini7,1
lspci -vv
00:02.0 VGA compatible controller: Intel Corporation Haswell-ULT Integrated Graphics Controller (rev 09) (prog-if 00 [VGA controller])
Subsystem: Apple Inc. Device 0141
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0
Interrupt: pin A routed to IRQ 56
Region 0: Memory at a0000000 (64-bit, non-prefetchable) [size=4M]
Region 2: Memory at 90000000 (64-bit, prefetchable) [size=256M]
Region 4: I/O ports at 2000 [size=64]
Expansion ROM at <unassigned> [disabled]
Kernel driver in use: i915
Changed in linux (Ubuntu): | |
importance: | Undecided → High |
tags: | added: performing-bisect regression-update wily |
Changed in linux (Ubuntu): | |
status: | Incomplete → Triaged |
Changed in linux (Ubuntu Wily): | |
status: | New → Triaged |
importance: | Undecided → High |
Changed in linux (Ubuntu): | |
status: | In Progress → Incomplete |
Changed in linux (Ubuntu Wily): | |
status: | In Progress → Incomplete |
Changed in linux (Ubuntu): | |
assignee: | Joseph Salisbury (jsalisbury) → nobody |
Changed in linux (Ubuntu Wily): | |
assignee: | Joseph Salisbury (jsalisbury) → nobody |
This bug is missing log files that will aid in diagnosing the problem. From a terminal window please run:
apport-collect 1536567
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the Ubuntu Kernel Team.