Update: I can confirm that the solution (or workaround) provided by Uwe is working also on my ProBook 6450b.
First some hardware info: 00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated Graphics Controller (rev 02) (prog-if 00 [VGA controller]) Subsystem: Hewlett-Packard Company Core Processor Integrated Graphics Controller 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 10 Region 0: Memory at d0000000 (64-bit, non-prefetchable) [size=4M] Region 2: Memory at c0000000 (64-bit, prefetchable) [size=256M] Region 4: I/O ports at 4050 [size=8] [virtual] Expansion ROM at 000c0000 [disabled] [size=128K] Capabilities: [90] MSI: Enable- Count=1/1 Maskable- 64bit- Address: 00000000 Data: 0000 Capabilities: [d0] Power Management version 2 My /etc/X11/xorg.conf.d/20-intel.conf contains: Section "Device" Identifier "Intel Graphics" Driver "intel" Option "AccelMethod" "SNA" Option "TearFree" "true" Option "Tiling" "true" EndSection I no longer experience black screen and hard freeze (on my system not even alt+sysrq+RSEIUB worked). Many thanks to Uwe for providing not only a well written bug report, but also a solution! -- Securely sent with Tutanota. Claim your encrypted mailbox today! https://tutanota.com
