https://bugzilla.kernel.org/show_bug.cgi?id=201953 Bug ID: 201953 Summary: System freeze/hang during shutdown/restart (at " sd 0:0:0:0: [sda] Stopping disk") Product: SCSI Drivers Version: 2.5 Kernel Version: 4.* ish (i checked many distros and everything has it)) Hardware: Intel OS: Linux Tree: Mainline Status: NEW Severity: high Priority: P1 Component: Other Assignee: scsi_drivers-other@xxxxxxxxxxxxxxxxxxxx Reporter: sivadasrajan007@xxxxxxxxx Regression: No Created attachment 279923 --> https://bugzilla.kernel.org/attachment.cgi?id=279923&action=edit phphoto of frozen screen during shutdown(screen is black during restart hang) I was using kali linux 2018.2 on my laptop(hardware specs at the end) without any problem. then i replaced my hard disk with an ssd and this problem started during 95% of shutdowns/restart The real problem ================ 1)When i shutdown the system hangs at this specific step(photo of frozen screen during shutdown is attached,for restart screen goes black and hang) 2)when i restart screen turns off (goes black/backlight turns off) but still frozen (hdd/wifi/numlock leds stuck) the last messege on screen is the following "sd 0:0:0:0: [sda] Stopping disk" i tried the following distros and all has the same problem (why i concluded this is a kernel issue) => kali 2018.2 => ubuntu 18.4 LTS => fedora workstation 29-1.2 => openSUSE Tumbleweed 20181120 (netinstall) NOTE: 1) this system used to have a baytrail cstate freeze bug https://bugzilla.kernel.org/show_bug.cgi?id=109051 and fixed with the boot parameter you may find the following info useful HARDWARE of my SYSTEM ===================== i use a laptop HP-15-r250tu with the following hardware cpu: intel pentum N3540 ram: 4gb samsung ddr3 graphics: intel hd graphics (Vendor ID: 0x8086,Device ID: 0x0F31) storage: KINGSTON A400 SSD 240GB (SA400S37/240g) =========================================================================== My findings:(maybe somone find this useful,probably not for experts ) -------------------------------------- i have no prior experiance with linux kernel code. but i downloaded linux source v4.19.8 and found these *) the kernel module that issue this "Stop disk" command is sd (drivers/scsi/sd.c) *)and this traces to a general function call to execute all scsi commands which is "scsi_execute(sdp, cmd, DMA_NONE, NULL, 0, NULL, &sshdr,SD_TIMEOUT, SD_MAX_RETRIES, 0, RQF_PM, NULL)" My conclusion(from my knowledge and understanding :-) ) ------------------------ probably cause is "scsi_execute" function not returning, so that it put the system in a very long wait . THats all i have hope we togather can fix this -- You are receiving this mail because: You are watching the assignee of the bug.
